DELETED PORTIONS 22-33 ENGLISH

 

SRI SWARNA VIDHYASHRAM CBSE

DELETED PORTION 22-23

CBSE Class 10 English Deleted Syllabus for Board Exam 2022-23

Deleted Syllabus:

First Flight: PROSE: Ch 5: The Hundred Dresses – I

Ch 6: The Hundred Dresses – II

POEM: P7: Animal

Footprints Without Feet: Ch8: The Hack Driver

DELETED PORTIONS 22-33 MATHS

 

SRI SWARNA VIDHYASHRAM CBSE

DELETED PORTION 22-23

CBSE Class 10 Maths Deleted Syllabus for Board Exam 2022-23

Chapter Name	Deleted Topics
Real Number	Euclid’s division lemma, Decimal representation of rational numbers as terminating or non-terminating recurring decimals.
Polynomials	Statements and simple problems on the division algorithm for polynomials with real coefficients.
Pair of Linear Equation in Two Variables	Simple problems on equations are reducible to linear equations.
Quadratic Equations	No Deletion
Arithmetic Progression	No Deletion
Coordinate Geometry	Area of Triangle
Triangles	The proof of the following theorems is removed: If a perpendicular is drawn from the vertex of a right angle to the hypotenuse of a right triangle, then the triangles on each side of the perpendicular are congruent to the whole triangle and similar to each other. The ratio of the areas of two similar triangles is equal to the ratio of the squares of their corresponding sides. In a right-angled triangle, the square on the hypotenuse is equal to the sum of the squares of the other two sides. In a triangle, if the square of one side is equal to the sum of the squares of the other two sides, then the angles opposite to the first side are right angles.
Circles	No Deletion
Construction	Complete Chapter Deletion
Introduction to Trigonometry	No Deletion
Trigonometric Identities	Trigonometric ratios of complementary angles
Height and Distance	No Deletion
Area related to Circle	No Deletion
Surface Area and Volume	The frustum of a cone. Problems related to the conversion of one type of metallic solid to another and other mixed problems. (Problems involving the combination of more than two different solids to be taken).
Statistics	Step Deviation Method for finding the mean Cumulative Frequency graph
Probability	No Deletion

DELETED PORTIONS 22-33 SCIENCE

 

SRI SWARNA VIDHYASHRAM CBSE

DELETED PORTION 22-23

CBSE Class 10 Science Deleted Syllabus 2022-23

                                                                                                               25-08-22

Chapter Name	Deleted Topic
Periodic Classification (Full Chapter Deleted)	Need for classification, early attempts to classify elements (Döbereiner’s triad, Newland’s law of octet, Mendeleev’s periodic table), the modern periodic table, gradation in properties, valency, atomic number, metallic and non-metallic properties.
Heredity and Evolution	Basic Concepts of Evolution: Evolution; Growth and classification and development should not be equated with progress.
The Human Eye and the Colourful World	Application of scattering in explaining the color change of the sun at sunrise and sunset
Magnetic Effects of Current	Electric motor, electromagnetic induction, The induced potential difference, Induced current, Fleming’s right-hand rule, an electric generator.
Sources of Energy (Full Chapter Deleted)	Various forms of energy, conventional and non-conventional sources of energy: fossil fuels, solar energy; biogas; wind, water, and tidal energy; Nuclear Energy. Sources of renewable versus non-renewable energy.
Management of Natural Resources (This chapter will not be assessed in the year-end exam. It needs to be prepared for internal assessment only.)	Conservation and judicious use of natural resources. forest and wildlife; Coal and petroleum conservation. Examples of people’s participation to conserve natural resources. Large Dams: Advantages and Limitations; options, if any. water harvesting. sustainability of natural resources

GRADE X BIOLOGY 6 LIFE PROCESSES TEST 1

 CBSE Test Paper-01

Chapter 06 Life Processes

1. Instant source of energy is ___________. (1)

a. Sucrose

b. Fats

c. Glucose

d. Amino acids

2. Which of the following element is essential for the formation of protein (1)

1. N

2. Ca

3. Na

4. Fe

CBSE Test Paper-01

Chapter 06 Life Processes

1. Instant source of energy is ___________. (1)

a. Sucrose

b. Fats

c. Glucose

d. Amino acids

2. Which of the following element is essential for the formation of protein (1)

3. Out of the four experimental set-up shown below, which one will demonstrate the evolution of carbon dioxide during respiration of germinating seeds ? (1)

a. III

b. II

c. IV

d. I

4. A leaf from a destarched plant is covered with black paper strip as shown in figure 1.

The starch test is done on the leaf after 8 hours.

The result will be as shown in diagram. (1)

1. D

2. C

3. A

4. B

5. To prepare a good temporary mount of the petunia leaf peel showing many stomata,

the student has to get the peel from the (1)

1. lower surface of the leaf

2. tip of the leaf

3. point of attachment of the leaf to its petiole.

4. upper surface of the leaf

6. Which are material required for setting up an experiment to show that light is

necessary for photosynthesis? (1)

7. What is excretion? How do unicellular organisms remove their wastes? (1)

8. Why carbon dioxide is mostly transported in dissolved form? (1)

9. In which cell organelle does respiration occur? (1)

10. What are the end products formed during fermentation in yeast? Under what

conditions a similar process takes place in our body that leads to muscle cramps? (3)

11. What are the components of the gastric juice? What are their functions? (3)

12. Why is urine more concentrated in summers? (3)

13. Only deoxygenated blood is pumped through a fish's heart. Is it true? Justify your

answer. (3)

14. What are the components of transport system in human beings? What are function of

these components? (5)

15. What is the significance of photosynthesis? (5)

Answers

1. c. Glucose

Explanation: Glucose is simple sugar which is formed when carbohydrate get

broken. Also, the carbohydrates get digested into glucose. Since, glucose does

not have to be digested, it acts as an instant source of energy

2. a. N

Explanation: Nitrogen is a component of amino acids and urea. Amino acids

are the building blocks of all proteins. So, N is essential for the formation of

protein.

3. c. IV

Explanation: Presence of KOH solution, germinating seeds and rubber cork in

conical flask and water in beaker.

4. d. B

Explanation: Sunlight is not available to the covered portion, hence no starch

remains white after starch test.

5. a. lower surface of the leaf

Explanation: Stomata are mainly present on the lower surface of the leaf.

6. A healthy potted plant, a petri dish, a beaker containing water, forceps, a water bath,

a piece of wire gauze, a tripod, a burner, a box of matches, alcohol a strip of black

paper, iodine solution and clips.

7. The biological process which involves the removal of harmful metabolic wastes from

the body is called excretion. Unicellular organisms remove wastes by simple diffusion

through their body surfaces. Where as multicellular organism has various organs for

excretion such as kidney.

8. Carbon dioxide is more soluble in water than oxygen that's why it is transported in

soluble form.

9. Respiration occurs in the mitochondria of a cell.

10. The end products formed during anaerobic respiration or fermentation in yeast are

carbon dioxide and ethanol along with ATP. A similar process in seen in our body

when there is lack of oxygen in muscles, leading to the muscle fatigue. It results due to

the accumulation of lactic acid produced during anaerobic respiration of glucose. The

energy or ATP produced during anaerobic respiration is much less as compared to

aerobic respiration.

11. Gastric juice contains three components: hydrochloric acid, enzyme pepsin and

mucus. Their functions are:

1. Hydrochloric acid in the stomach is used to make the medium acidic to facilitate

the action of the enzyme pepsin and to kill germs if any.

2. Enzyme pepsin digests proteins to convert them into peptones.

3. The mucus helps to protect the stomach wall from its own secretions of

hydrochloric acid.

12. In summers consumption of water is increased and despite that amount of urine

excreted is less. This is because most of the water is excreted in the form of sweat

which is evaporated soon due to high environmental temperature. It keeps our body

cool and hence concentrated yellowish urine is excreted.

13. Yes, this statement is true, only deoxygenated blood is pumped in to fish's heart. The

heart pumps out deoxygenated blood, which is oxygenated by the gills. It is then

supplied to other body parts from where deoxygenated blood is returned to the heart

and this is possible because fish have two chambered heart.

14. There are two main transport systems in human beings:

1) Blood vascular system.

2) Lymphatic system.

Components of blood vascular system

1. Blood: It is a reddish viscous fluid connective tissue. In an adult human being, it

is 5-6 litres in amount. It is heavier than water and about five times thicker. Blood

is slightly alkaline with a pH of 7.3-7.45. Blood consists of two parts – plasma and

formed elements. (RBC, WBC and blood platelets)

2. Heart: It is a hollow, muscular pumping organ. Heart is very well protected by

thoracic cage formed by ribs and muscles and a double walled transparent sac

called pericardium. They cavity of pericardium, pericardial cavity is filled with

pericardial fluid. It is shock absorbing and act as a lubricant so as to allow free

frictionless movements.The heart in fact, has four water tight chambers, the

receiving chambers called auricles or atria and the distributing chambers

ventricles. The left half of the auricle receives purified blood from the lungs and

empties into left ventricle. The left ventricle distributes blood to various organs

and tissues through the blood vessels.

3. Blood vessels: The blood vessels which carry oxygenated blood are called

arteries. The arteries on reaching the organ, divide into arterioles. They further

divide to form capillaries of finer dimensions. Exchange of materials takes place

across the capillaries. It is possible because the walls of capillaries are extremely

thin. The blood from the tissues is cleared by small venules which unite to form

veins. Several veins from different organs join to form various vena cava.

Components of Lymphatic system

1. Lymph : Lymph is similar to blood but RBCs are absent in lymph.

2. Lymph vessels:

3. Lymph capillaries: Lymph is formed from the fluid which leaks from blood

capillaries and goes to the intercellular spaces in the tissues.

4. Lymph nodes

15. Photosynthesis is the most important and basic process which sustains life on this

earth. It has manifold significance such as:

a. It synthesises food from inorganic substances. This food becomes the ultimate

source of energy and life for all the living organisms.

b. It is the only known method which release oxygen in the atmosphere and keeps

the O2 concentration constant. The consumption of O2 by living organisms during

respiration is compensated by photosynthesis.

c. It also helps to keep the CO2 concentration in the atmosphere constant. The CO2

being released due to the respiration of living organisms is being incorporated

into glucose during photosynthesis.

d. Coal, petroleum and natural gas are fossil fuels. These have been produced by the

application of heat and compression on the past plants.

e. All useful plant products such as timber, rubber, resins, drugs, oils, fibres etc. are

derived from the process of photosynthesis.

f. Green plants are the main producers of food in the ecosystem. All other organisms

directly or indirectly depend on green plants for food

GRADE X BIOLOGY 6 LIFE PROCESSES TEST 2

 CBSE Test Paper-02

Chapter 06 Life Processes

1. Bile is secreted by (1)

a. Pancreas

b. Duodenum

c. Liver

d. Gall bladder

2. Covering with black paper strips should be tested for presence of (1)

a. O2 in leaf

b. Starch in leaf

c. Water in leaf

d. CO2 in leaf

3. Twenty dry raisins were soaked in 50 mL of water and kept for one hour at 50°C.

Which out of the following was the correct observation? (1)

a. 10 raisins absorbed water, 10 did not

b. 15 raisins absorbed water, 5 did not

c. 8 raisins absorbed water, 12 did not

d. all the 20 raisins absorbed water

4. Which gland in the human body which secretes digestive enzymes as well as a

hormone? (1)

a. Ovary

b. pancreas

c. thyroid

d. Testis

5. Four students, A, B, C and D, make the records given below, for the parts marked 'X'

and 'Y' in this diagram.

Student X Y

A Stoma Guard cell

B Guard cell Stoma

C Epidermal cell Stoma

D Stoma Epidermal cell

The correct record, out of these, is that of student : (1)

a. A

b. C

c. B

d. D

6. Name the system responsible for transportation of materials in human body. (1)

7. Name thin walled air sacs of the lungs. (1)

8. What is mode of nutrition in fungi? (1)

9. Mention any three methods adopted by plants to minimise the transpiration rate. (1)

10. Mention the role of pancreatic enzyme. (3)

11. How is opening and closing of stomata regulated? (3)

12. How does water reach upto the leaves ? (3)

13. Differentiate between aerobic and anaerobic respiration. (3)

14. Describe the process of urine formation in kidneys. (5)

15. What is nutrition? Briefly explain the two major kinds of nutrition. (5)

Answers

1. c. Liver

Explanation: Bile or gall is a dark green to yellowish brown fluid, produced

by the liver of most vertebrates, that aids the digestion of lipids in the small

intestine. In humans, bile is produced continuously by the liver (liver bile), and

stored and concentrated in the gallbladder (gallbladder bile).

2. b. Starch in leaf

Explanation: The covered part of the leaf does not show presence of starch,

while the uncovered part shows starch.

3. d. all the 20 raisins absorbed water

Explanation: All raisins absorb water due to endomosis at high temperature.

4. b. pancreas

Explanation: Pancreas is both an endocrine and an exocrine gland, in that it

functions to produce endocrinic hormones released into the circulatory system

(such as insulin, and glucagon), to control glucose metabolism, and also to

secrete digestive/exocrinic pancreatic juice (such as trypsin), which is secreted

eventually via the pancreatic duct

5. a. A

Explanation: Stomatal pore is grounded by guard cell.

6. 1) Blood vascular system

2) Lymphatic system

7. Each small tube ends in clusters of thin-walled air sacs, called alveoli. It is the alveoli

that receive the oxygen and pass it on to the blood

8. In fungi, there is saprotrophic mode of nutrition. In this case organisms obtain food

from dead and decaying organic matter.

9. Three methods adopted by plants to minimize the rate of transpiration are:

i. In some cases leaves are rolled to cover stomata (e.g. some grasses)

ii. The stomata may be sunken (e.g. Nerium)

iii. In some cases, leaves may be dropped or absent as in most cacti.

10. Pancreatic enzymes help break down fats, proteins and carbohydrates. A normally

functioning pancreas secretes about 8 cups of pancreatic juice into the duodenum,

daily. This fluid contains pancreatic enzymes to help with digestion and bicarbonate

to neutralize stomach acid as it enters the small intestine. Pancreatic enzyme trypsin

helps in digesting protein and the pancreatic amylase helps in the breakdown of

starch.

11. Stomatal pores in plants regulate the amount of water and solutes within them by

opening and closing their guard cells using osmotic pressure. When water enters the

guard cells from the subsidiary cells by osmosis, then the guard cells swell up and the

stoma opens. When the water moves out of the guard cells, then it shrinks and the

stomatal pore closes.

12. Water is taken up by the roots and reaches the leaves through the xylem vessels

which are a part of the vascular bundle.

13.

Aerobic Respiration Anaerobic Respiration

a) It occurs in the presence of oxygen a) It occurs in the absence of oxygen

b) It occurs in cytoplasm and in the

mitochondria

b) It occurs in cytoplasm

b) Complete breakdown of glucose

occurs

c) Incomplete breakdown of glucose occurs

d) End products are CO2 and H2O

d) End products are CO2 and ethyl alcohol

or lactic acid

e) Amount of energy produced is more. e) Amount of energy produced is less.

14. Urine is formed in the nephron of kidneys. Nephron is the structural and functional

unit of the kidney. Blood at high pressure travels into these tubules by the tuft of

blood capillaries called glomerulus contained in Bowman's capsule.

The following steps are involved in the process:

i. Filtration: Blood enters the glomerulus through the afferent arterioles It passes

under high pressure that results in the filtration of blood. Water and small

molecules are forced out of glomerular capillary walls and Bowman’s capsule.

Large molecules remain in the blood of the glomerulus.

ii. Selective reabsorption: Some molecules are selectively reabsorbed into the

blood. The glomerular filtrate flows through the proximal convoluted tubule, the

U-shaped Henle’s loop and distal convoluted tubule. The useful substances such as

glucose, amino acids and salts which require energy are reabsorbed by a process

called selective reabsorption. Hence, the filtrate now contains urea, some salts and

water. Reabsorption of solutes increases the water concentration of the filtrate.

Water is then reabsorbed into the blood by osmosis.

iii. Tubular secretion: Some nitrogenous waste products like creatinine and some

other substances like K+ are removed from the blood by DCT (Distal Convoluted

Tubule) and are passed to blood. The urine thus formed is collected in the urinary

bladder.

15. Nutrition: All living organisms need matter to build up the body and energy to

operate the metabolic reactions that sustains life. The materials which provide these

two primary requirements of life are called nutrients or foods. The sum total of

processes by which organisms obtain matter and energy is termed nutrition.

Modes of nutrition

The organisms have evolved two different modes of nutrition:

1. Autotrophic or Holophytic nutrition: All green plants and certain protozoans

(Euglena) have evolved a mechanism to directly use the energy of sunlight for

preparing organic food in their own body from simple raw materials i.e. CO2 and

H2O. These single inorganic materials are transformed into glucose and oxygen is

evolved.

Energy is trapped with the help of chlorophyll present in chloroplasts of cells. The

process is called photosynthesis and the organisms capable of it are termed

photoautotrophs.

6CO2 + 6H2O C6H12O6 + O2

Carbon dioxide Water Gloucose Oxygen

Some bacteria are known as chemotrophs, as they obtain energy released during

oxidation of inorganic chemicals, and the process as chemosynthesis. Nitrifying

bacteria Nitrosomonas and Nitrobacter are chemotrophs.

2. Heterotrophic nutrition: Animal, fungi, (Amoeba) and many bacteria cannot

utilize sun energy. They use chemical bond-energy of organic molecules

synthesized by other organisms in building their own organic molecules. Such a

mode of feeding is termed heterotrophic nutrition, and the organisms having it

are called heterotrophs.

GRADE X BIOLOGY 6 LIFE PROCESSES TEST 3

 

CBSE Test Paper-03

Chapter 06 Life Processes

1. Raisins swell up after being placed them in a beaker containing water for sometime

because: (1)

a. the concentration of water in the cell sap is the same as that of water in the beaker

b. water inside the raisins passes out of them when placed in a beaker of water

c. the concentration of water in the cell sap is higher than the water in the beaker.

d. the concentration of water in the cell sap is lower than the water in the beaker

2. Match the following with correct response. (1)

(1) Saliva (A) sucrose

(2) Gastric juice (B) Pepsin

(3) Pancreatic juice (C) Amylase

(4) Succuss entricus (D) Trypsin

a. 1-A, 2-C, 3-B, 4-D

b. 1-C, 2-B, 3-D, 4-A

c. 1-B, 2-D, 3-A, 4-C

d. 1-D, 2-A, 3-C, 4-B

3. Three students Jagdeep, Gautam and Gurdev get 10 gm raisins equally. They soaked

the raisins in distilled water at room temperature. They removed the raisins after 35

minutes. 1 hour 15 minutes and 2 hours respectively. Who got more percentage

absorption of water? (1)

a. Gurdev

b. Gautam

c. Jagdeep, Gautam and Gurdev

d. Jagdeep

4. Which is the vestigial part of human alimentary canal? (1)

a. epiglottis

b. pineal gland

c. thymus gland

d. Vermiform appendix

5. If the water absorbed by soaked raisins is 50% then the weight of raisins before

soaking in water W1 and the weight of raisins after soaking in water W2 might have

been (1)

a. W1 = 30g and W2 = 50 g

b. W1 = 50g and W2 = 100 g

c. W1 = 5 g and W2 = 25 g

d. W1 = 20g and W2 = 30 g

6. Name the exchange of gases between the blood and the air at the respiratory surface.

(1)

7. When do viruses show movements? (1)

8. Which of these blood vessel carry less nitrogenous waste - renal vein or the renal

artery? (1)

9. After drinking access of cold drink, a person suffered from acidity. Explain? (1)

10. What is the advantage of four chambered of heart? (3)

11. The pulse rate increases due to physical exercise. Why? (3)

12. A girdled tree dies if the girdle is wide and is not filled up. comment. (3)

13. State the function of Bowman's capsule and glomerulus. (3)

14. Describe the structure and functioning of nephrons. (5)

15. Draw the diagram of part of leaf from which transpiration takes place. Explain

stomatal or foliar transpiration. (5)

Answers

1. c. the concentration of water in the cell sap is higher than the water in the beaker.

Explanation: Due to osmosis, water moves from lower concentrated solution

to higher concentrated solution.

2. b. 1-C, 2-B, 3-D, 4-A

Explanation:

An amylase is an enzyme that catalyses the hydrolysis of starch into

sugars. Amylase is present in the saliva of humans and some other

mammals.

Pepsin is the powerful enzyme in gastric juice that digests proteins such

as those in meat, eggs, seeds, or dairy products.

Three enzymes found in pancreatic juice, called trypsin, chymotrypsin

and carboxypeptidase, are the pancreatic enzymes that complete the

digestion of proteins. Because proteins are held together by peptide

bonds, these enzymes work by breaking peptide bonds.

The ileum and the jejunum parts of the small intestines secrete a

combination of several enzymes called succus entericus. Succus

entericus contains sucrose which is used in the breakdown of sucrose

into fructose and glucose.

3. a. Gurdev

Explanation: Absorption of water increases with time upto its maximum

limit.

4. d. Vermiform appendix

Explanation: Vestigial organs can be defined as an organ that once was useful

in an animal's evolutionary past, but that now is useless or very close to useless.

As vermiform appendix plays no significant function in humans, so it is

considered as a vestigial organ.

5. d. W1 = 20g and W2 = 30 g

Explanation:

6. External respiration

7. When the virus is outside the living body they as they are dead but by entering the

living body they start showing molecular movement.

8. Renal vein carries deoxygenated but purified blood (has less nitrogenous waste) away

from the kidney.

9. Cold drinks contain carbon dioxide dissolved in them under pressure. some amount

of the gases escape when a bottle of cold drink is opened while a portion of it remain

dissolved. Carbon dioxide dissolved in water from a weak acid, carbonic acid.

consumption of excess of cold drink accumulation of carbonic acid in the stomach

which is responsible for the development of acidity.

10. The right and left parts are separated by a septum to prevent oxygenated and

deoxygenated blood from mixing. This is particularly advantageous in warm-blooded

animals such as birds and mammals who constantly use energy to maintain their

body temperature.

11. The arteries expand as the ventricles pump this blood out of the heart, and this is

known as a pulse. Fundamentally, exercise will increase the need for additional food,

known as energy, and oxygen in the body. The breathing will increase to rid the body

of carbon dioxide and to provide more oxygen, and the pulse will increase to provide

the extra food and oxygen needed.

12. Girdling removes bark containing phloem from the trunk region. Food manufactured

foliage does not reach the roots which requires the same as they are always growing.

In the absence of food supply, roots starve and stop absorbing water. The foliage wilts

and the plants dies.

13. Bowman’s capsule and glomerulus have semipermeable walls. The glomerulus, is a

tuft of capillaries contained in Bowman’s capsule. The water and dissolved substances

(wastes and useful) are filtered into the Bowman’s capsule and from here they are

sent into the tubule. Thus, both the structures act as filtering apparatus.

14. Structure of Nephron: Nephron is the structural and functional unit of kidney.

i. It consists of a long coiled tubule differentiated into proximal tubule, loop of Henle

and distal tubule. The latter opens into the collecting tubule.

ii. At the proximal end of the nephron lies a double-walled cup-shaped structure

called Bowman’s capsule.

iii. The Bowman’s capsule contains a bundle of blood capillaries which is called

glomerulus.

iv. In the glomerulus, the blood that comes in through afferent arteriole is drained

out through efferent arteriole.

Functions of Nephron:

i. Filtration: Filtration of blood takes place in Bowman’s capsule from the capillaries

of glomerulus. This takes place under high pressure. The filtrate passes into the

tubular part of the nephron. This filtrate contains glucose, amino acids, urea, uric

acid, salts and major amount of water.

ii. Selective Reabsorption: As the filtrate flows along the tubule, useful substances

such as glucose, amino acids, salts and water are selectively reabsorbed into the

blood by capillaries surrounding the nephron tubule. The amount of water

reabsorbed depends on the need of the body and also on the amount of wastes to

be excreted.

iii. Tubular secretion: Certain substances which are harmful and not needed by the

body like ammonia, potassium, creatinine and hydrogen ions are secreted from

the capillary blood into the lumen of distal tubule. This is called tubular secretion.

15. Stomatal transpiration: The epidermis has minute pores called stomata. Each

stoma is surrounded by two specialised epidermal cells called guard cells. The guard

cells are kidney-shaped, process chloroplasts and less elasticity. Adjacent to the

epidermal cells, their walls are thin and elastic. They are thickened near the openings.

The stomata remain open in light and close in darkness. Guard cells control the

opening or closing of stomata.

The stomata form the chief pathway of transpiration. Though the relative total area of

the stomatal pore is 1-2% of the total area of the leaf, more transpiration takes place

through these stomata only.

GRADE X BIOLOGY 6 LIFE PROCESSES TEST 4

GRADE 10 BIOLOGY CBSE 

CBSE Test Paper-04

Chapter 06 Life Processes

1.Which of the following does not respire through lungs? (1)

1.Duck

2. Frog

3. Whale

4. Tadpole

2. An apparatus was set-up to show that germinating seeds release carbon dioxide

during respiration. which observation out of the following should be made to get

correct results ? (1)

a. See if the KOH in the test tube has absorbed CO2 released by germinating seeds

b. Check the change in the level of water present in the beaker

c. Check if CO2 is coming into the delivery tube

d. Carefully observe if there is any change in the size of germinating seeds

3. In the experiment to prove that light is necessary for photosynthesis, which one of the

following is not required ? (1)

a. Water

b. KOH

c. Iodine

d. Alcohol

4. The rate of photosynthesis is maximum in (1)

a. Green light

b. Red light

c. Brown light

d. Yellow light

5. The figure which does not illustrate any of the steps of the experiment to show that

light is necessary for photosynthesis is (1)

a. I

b. I, II, and IV

c. I and III

d. III

6. What is the function of amylase? (1)

7. What are resins and gums? (1)

8. What is the quantity of blood in human body? (1)

9. Write one function of valves in the walls of veins. (1)

10. Differentiate between Pulmonary artery and Pulmonary veins. (3)

11. How many pairs of salivary glands are there in humans ? Where do they open? (3)

12. How is respiration different from breathing. (3)

13. Give the chemical equation of photosynthesis. (3)

14. Describe the flow of blood through the heart of human beings. (5)

15. i. Draw the structure of a nephron and label the following parts on it. (5)

a. Renal artery

b. Bowman's capsule

c. Glomerulus

d. Collecting duct

ii. Name four substances in the initial filtrate which are selectively reabsorbed as the

filtrate floor along the tubule.

Answers

1. d. Tadpole

Explanation: A tadpole lives under water so it only has one way of gas

exchange (through the gills). First, the tadpoles open their mouth to let water

enter. Then, the water moves into the gills which contain small membranes

called lamella.

2. b. Check the change in the level of water present in the beaker

Explanation: The level of water in U-shaped delivery tube dipped in water of

the beaker rises.

3. b. KOH

Explanation: The leaf has to be boiled in alcohol in a water bath and to be

tested with iodine for starch.

4. b. Red light

Explanation: The main factors affecting rate of photosynthesis are light

intensity, carbon dioxide concentration and temperature.The wavelength of

light is also important. PSI absorbs energy most efficiently at 700 nm and PSII at

680 nm. Light with a higher proportion of energy concentrated in these

wavelengths will produce a higher rate of photosynthesis. The wavelength of

red light is maximum.

5. d. III

Explanation: The experiment does not require heating of leaf in dried

condition.

6. Amylase converts starch into maltose.

7. Resins and gums are storage wastes of plants.

8. 5-6 litres.

9. The valves in the walls of veins prevent the backflow of blood.

10.Pulmonary artery Pulmonary veins

1) Pulmonary artery arises from the

right ventricle.

1) Pulmonary veins arise from the lungs.

2) It carries deoxygenated or impure

blood to the lungs for purification.

2) They carry the oxygenated or pure blood

to the left auricle.

3) The pulmonary artery is provided

with semilunar valves at the base in

the heart.

3) The openings of pulmonary veins into the

heart are not guarded by valves.

4) The pulmonary artery splits into

two branches, one for each lung.

4) The pulmonary vein splits into four

branches, two for each lung.

5) The pulmonary artery has a

relatively thick wall with elastic

muscle layer.

5) The muscle layer of the pulmonary vein’s

wall is much thinner than this in the

pulmonary artery.

6) The heart pumps the blood into

the pulmonary arteries at high

pressure.

6) In the pulmonary veins the blood pressure

is lower than in pulmonary arteries.

11. There are three pairs of salivary glands in human beings. They open into the buccal

cavity.

12. Differences between breathing and respiration

Breathing Respiration

1) It is ventilation or bringing in of

oxygenated air and giving out

deoxygenated air.

1) Respiration of animals includes

breathing, gaseous exchange and

catabolic breakdown of food.

2) Breathing is a physical and voluntary

process.

2) Respiration is a chemical and

involuntary process.

3) Breathing does not liberate energy. 3) It liberates energy.

4) It is restricted to organs where

gaseous exchange occurs between blood

and atmospheric air.

4) Respiration involves every living cell of

the body.

5) Breathing takes place in the

respiratory organs called as lungs.

5) Respiration takes place in the cells.

6) Breathing involves respiratory organs

and the cells called as alveoli.

6) Respiration involves cells in the body

an their organelles.

13. A chemical equation of photosynthesis is

6CO2 + 6H2O C6H12O6 + 6O2

14. The heart is the major organ of our body which continuously pumps oxygen and

nutrient-rich blood throughout our body to sustain life. As the heart beats, it pumps

blood through a system of blood vessels, called the circulatory system.

The blood enters the heart through two large veins, the inferior and superior vena

cava, emptying oxygen-poor blood from the body into the right atrium. As the atrium

contracts, blood flows from your right atrium into your right ventricle through the

open tricuspid valve. When the ventricle is full, the tricuspid valve shuts. This

prevents blood from flowing backward into the right atrium while the ventricle

contracts. As the ventricle contracts, blood leaves the heart through the pulmonic

valve, into the pulmonary artery and to the lungs, where it is oxygenated. The

oxygenated blood then returns to the heart through the pulmonary veins. And finally,

the oxygenated blood from the left ventricle is pumped through the aorta to the whole

body.

15. i.

ii. Glucose, amino acids, salts and adequate amount of water are reabsorbed initially

after ultrafiltration.