TS 10th Class Biology Question Paper March 2024

Students must rely on TS 10th Class Biology Model Papers TS 10th Class Biology Model Paper March 2024 to gauge their understanding of exam patterns.

TS 10th Class Biology Question Paper March 2024

Parts – A and B

Time : 1:30 hrs.
Max. Marks : 40

Instructions :

1. Read the question paper carefully and understand.
2. Answer the questions under Part – A in the answer sheet provided.
3. Part – A contains three sections: Section -1, II and III.
4. Part – B Answers should be written in the given brackets and attach to the Part – A answer sheet.
5. Write the answers by following the instructions given in the each section.

Part – A
Section – I (3 × 2 = 6 M)

Time : 1 Hour 15 min.
Marks: 30

Instructions :
i) This section contains 3 very short answer questions.
ii) Answer ALL the questions.
iii) Write the answers in 3 – 4 sentences.
iv) Each question carries 2 marks.

Question 1.
Write any two materials required to conduct an experiment to observe the internal structure of the mammalian heart.
Answer:
Materials required:
1. Freshly collected specimen of heart of sheep or goat.
2. Soda straws
3. Sharp and long blade

Question 2.
Write any two biological principles to be followed by the farmers in your surroundings for controlling pests.
Answer:
The biological principles to be followed by the farmers to control pests are :

1. Rotation of crops
2. Studying the life histories of pests
3. Biological control
4. Genetic strains
5. Environmental ethics.

Question 3.
What will happen if moisture and hairs are absent in the nasal cavity of human being?
Answer:
1. The tiny particles of dirt inhaled air is not removed and
2. The temperature of the inhaled air is not corrected to that of the body.

Section – II (3 × 4 = 12 M)

Instructions:
i) This section contains 3 short answer questions.
ii) Answer ALL the questions.
iii) Write the answers in 5 – 6 sentences.
iv) Each question carries 4 marks.

Question 4.
Write four differences between aerobic respiration and anaerobic respiration.
Answer:

Aerobic respiration	Anaerobic respiration
1. It occurs in the presence of oxygen.	1. It occurs in the absence of oxygen.
2. Complete oxidation of glucose takes place.	2. The glucose molecule is incompletely oxidised.
3. End products are carbondioxide and water.	3. End products are either ethyl alcohol or lactic and CO,.
4. Energy liberated is very high (38 ATP).	4. Very little amount of energy is liberated (2 ATP).
5. It occurs in ‘plants and animals’ cells.	5. Occurs in many anaerobic bacteria and human muscle cells.
6. C8H12O2 + 6O2 → 6CO2 + 6H2O + 686K. cal	6. C6H12O6 → 2C2H5OH + 2CO2 + 56 K. cal

Question 5.
Explain any two artificial propagation methods you observed in your daily life with examples.
Answer:
Artificial Propagation methods :
a) Cutting: Some plants can grow individually when a piece of the parent plant having bud is cut off from the existing plant. The lower part of this cutting is buried in moist soil. After few days, the cut parts having buds grow as an individual plant after developing roots. Eg.: Rose, Hibiscus.

b) Layering: A branch of the plant with at least one node is bent towards the ground and a part of it is covered with moist soil leaving the tip of the branch is expose above the ground. After a few days, new roots develop from the part of the branch buried in the soil. The buried branch is then cut off from the parent’plant.
The part which has developed roots grow to become a new plant. Eg: Nerium, Jasmine.

Question 6.
Observe the picture given below and answer the following questions.

i) Name the scientist who conducted the experiment given in the above picture.
Answer:
i) In 1926, the Douch plant physiologist F.W. Went conducted experiment.

ii) Which phytohormone was discovered by the above experiment?
Answer:
The plant hormone Auxine (auxine means to increase).

iii) Write the effect of the phytohormone identified in the above experiment on plants.
Answer:
Within one hour a distinct bending away from the side on which the agar blocked was placed.

iv) In the above experiment, name the material placed on the cut coleoptile tips of the oat seedling.
Answer:
He placed the tips on a slice of agar and left them for about an hour.

Section – III (2 × 6 = 12 M)

Instructions :
i) This section contains 3 essay type of questions.
ii) Answer ANY TWO questions.
iii) Write the answer in 8 to 10 sentences.
iv) Each question carries 6 marks.

Question 7.
Explain the evidences of Evolution with examples.
Answer:
Some of the evidences of evolution are :
i) Homologous and analogous organs.
ii) Evidences from embryology and
iii) Evidences from fossils.

Evidence from embryology:
a) There are remarkable similarities in the embryos of different animals from fish to man.
b) The resemblance is so close that at an early stage even an experienced embryologist would find difficulty to distinguish one embryo from the other.
c) This strengthens the view of the existence of a common ancestor from which all these have evolved.

Question 8.
Draw a labelled diagram of internal structure of human kidney and explain the structure.

Answer:

1. L. S. of kidney shows two distinct regions. Dark coloured outer zone called cortex and pale coloured inner zone called medulla.
2. Each kidney has approximately more than one million (1.3 to 1.8 million) microscopic renal tubules.
3. These functional units are called nephrons or uriniferous tubules.
4. Internally there is a region called renal pelvis. There is a region called hilum of the kidney.
5. The hilum is the concave part of the bean shape where blood vessels and nerves enter and exit the kidney. It is also a point of exit for the ureters.
6. The medulla consists of the renal pyramids. The tips of the pyramid called renal papillae, point towards the renal pelvis.
7. The renal pelvis branches out into calyces.
8. The ureters are urine – bearing tubes that exit the kidney and enter into urinary bladder.

Question 9.
Explain the procedure and precautions of the experiment to prove Oxygen is evolved during Photosynthesis.
Answer:
Aim : To prove that oxygen is produced during photosynthesis by Hydrilla funnel experiment.
Materials required: Beaker, funnel, test tube, Hydrilla a plant, water, incense stick, match box.

Procedure:

1. Make two identical sets with water plant like Hydrilla.
2. Take the whole set under a bucket of water and invert a water filled test tube over the stem of funnel.
3. Take the set up out of the bucket and keep it under sunlight.
4. Arrange the second set in the same way, cover it with black paper / cloth. Keep them under shade observe the water level in the test tube.
5. After sometime it is observed that gas bubbles coming from the Hydrilla plant in the set up kept in sun.
6. These bubbles are collected at the end of the test tube pushing the water into the beaker.
7. After sufficient gas is collected, test – tube is taken out of the beaker carefully by closing it with thumb.

Observation:
a) Test the gas in the test – tube by inserting a glowing match stick or incense stick which would burst into flames. This shows that the gas released from Hydrilla plant is oxygen.
b) We observe that there is no gas in the other set up kept in the dark.
Result : This shows that the gas released from Hydrilla plant is oxygen. So oxygen gas is produced during photosynthesis.

Precautions:
a) Funnel should be smaller than the beaker.
b) Care should be taken while removing test tube from the stem of funnel.

Part – B

Time: 15 Minutes
Marks: 10

Instructions :
i) Answer all the questions.
ii) Each question carries 1 mark. ,
iii) Write the capital letter (A, B, C, D) showing the correct answer for the following questions in the brackets provided against them.
iv) Write the answers to the questions under Part-B on the question paper itself and attach it to the answer book of Part- A.
v) Marks will not be awarded in any case of overwriting, rewritten or erased answers.

Question 1.
Which of the following is used to check the presence of Oxygen in the Glucose solution in anaerobic respiration experiment? ( )
A) Diazene green
B) Iodine
C) Paraffin solution
D) Burning match stick
Answer:
A) Diazene green

Question 2.
Identify the CORRECT pair from the following. (  )
A) Root hair – Photosynthesis.
B) Xylem – Transportation of food material.
C) Phloem – Transportation of water.
D) Stomata – Transpiration.
Answer:
D) Stomata – Transpiration.

Question 3.
Which of the following is NOT a vestigial organ in human beings? (  )
A) Ear pinna
B) Nails
C) Appendix
D) Hair on skin
Answer:
B) Nails

Question 4.
August Weismann through his experiments proved (  )
A) Law of dominance.
B) Bodily changes are not inherited.
C) Inheritance of acquired characters.
D) Natural Selection.
Answer:
B) Bodily changes are not inherited.

Question 5.
Identify the INCORRECT sentence from the following. (  )
A) The transportation system without blood vessels is called closed circulatory system.
B) Circulation of blood twice through the heart is called double circulation.
C) The fluid portion after formation of the clot is called Serum.
D) The liquid portion of the blood with nutrients flows out of the capillaries called tissue fluid.
Answer:
A) The transportation system without blood vessels is called closed circulatory system.

Question 6.
The process of entry of pollutants into a food chain is (  )
A) Bio remediation
B) Bio magnification
C) Bio accumulation
D) Phytoremediation
Answer:
C) Bio accumulation

Question 7.
Identify the INCORRECT pair from the following. (  )
A) Ethylene – ripening of fruit.
B) Cytokinins – delay the ageing in leaves.
C) Gibberellins – seed dormancy.
D) Abscisic acid – closing of stomata.
Answer:
C) Gibberellins – seed dormancy.

Question 8.
Match the following and identify the CORRECT option. (  )
i) Vitamin A
ii) Vitamin C
iii) Vitamin D

a) Ascorbic acid
b) Tocoferol
C) Retinol
d) Calciferol

A) i – b, ii – a, iii – d, iv – c
B) i – c, ii – a, iii – d, iv – b
C) i – b, ii – c, iii – d, iv – a
D) i – c, ii – a, iii – b, iv – d
Answer:
B) i – c, ii – a, iii – d, iv – b

Question 9.
Find out the missing words in the given flow chart.

A) 1. Decomposers; 2. Producers.
B) 1. Producers; 2. Secondary consumers.
C) 1. Abiotic factors; 2. Producers.
D) 1. Decomposers; 2. Abiotic factors.
Answer:
B) 1. Producers; 2. Secondary consumers.

10. Identify the type of nerve cell in the picture given below.

A) Efferent neuron
B) Associated neuron
C) Sensory neuron
D) Motor neuron
Answer:
C) Sensory neuron