TS 10th Class Biology Model Paper Set 1 with Solutions

Students must rely on TS 10th Class Biology Model Papers Set 1 to gauge their understanding of exam patterns.

TS 10th Class Biology Model Paper Set 1 with Solutions

Time: 1:30 hours
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 – I, II, and III.
4. There is an internal choice to the questions under section – III.
5. Part-B Answers should be written in the given brackets and attach to the Part – A answer sheet.
6. Write the answers following the instructions given in each section.

Part – A (Marks 30)
Section- I (3 x 2 = 6M)

Instructions:

• This section contains 3 very short answer questions.
• Answer ALL the questions.
• Write answer to each question in 3 to 4 sentences.
• Each question carries 2 marks.

Question 1.
What is stroma?
Answer:
The intermediatory fluid-filled portion of chloroplast is called as stroma. It is believed to be responsible for enzymatic reactions leading to the synthesis of glucose.

Question 2.
What are aerial roots?
Answer:
Aerial roots are roots above the ground. The mangrove tree of tropics, sends up aerial roots and takes in oxygen.

Question 3.
What is a closed-type circulatory system?
Answer:
In this system, circulation occurs between the heart and blood vessels. E.g.: All mammals and vertebrates.

Section – II (3 x 3 = 9 M)

Instructions:

• This section contains 3 short answer questions.
• Answer ALL the questions.
• Write answer to each question in 5 to 6 sentences.
• Each question carries 3 marks.

Question 4.
Write briefly on axon.
Answer:

1. Axon is very long projection from cell body.
2. Each neuron has only one axon.
3. Unlike dendrites, axons are very long and are usually unbranched structures.

Question 5.
What factors could lead to the rise of a new species?
Answer:

1. The geographical isolation of a population caused by various steps of barriers such as mountain ranges and seas. This lead to reproductive isolation due to which there is no flow of genes between separated groups of population.
2. Genetic drift caused by drastic changes in the frequencies of particular genes by chance alone.
3. Variations caused in individuals duè to natural selection.

Question 6.
What is contour strip cropping? What is its use?
Answer:

1. Contour strip cropping is a method of soil conservation.
2. Several crops such as corn, wheat, and clover are planted in alternating strips across a slope or across the path of the prevailing wind.
3. Different crops with different roots systems and leaves, help to prevent soil erosion.

Section – III (3 x 5 = 15 M)

Instructions:

• This section contains 3 essay-type questions.
• Answer ALL the questions.
• There is an internal choice for each question.
• Write answer to each question in 8 to 10 sentences.
• Each question carries 5 marks.

Question 7.
We know that by taking different types of food materials we will get vitamins. For this what changes shall we take in our food habits?
(OR)
Write differences between the right ventricle and the left ventricle.
Answer:

1. Eating of unpolished rice for one time gives us vitamin thiamine in abundant amount.
2. We should eat the balanced food containing all nutrients in equal quantities.
3. Fresh leafy vegetables are rich source of vitamins Riboflavin, Folic acid and Vitamin ‘C So our diet should contain these leafy vegetables.
4. A sufficient amount of non-vegetarian foods like meat, poultry, fish, kidney and liver should be present in our food.
5. Eating fresh fruits also add number of vitamins to our body.
6. Whole cereals like wheat, rice provide number of vitamins to our body. So we shall eat required amount of cereals in our food;

(OR)

Right ventricle	Left ventricle
1) Smaller in size.	1) Larger in size.
2) Receives deoxygenated blood from right atrium (or) auricle.	2) Receives oxygenated blood from left atrium (or) auricle.
3) The tricuspid valve guards the right atrioventricular aperture.	3) Bicuspid valve guards the left-atrio ventricular aperture.
4) Pulmonary aorta’s origin takes place.	4) Systemic aorta’s origin takes place.
5) It supplies deoxygenated blood to the lungs.	5) it supplies oxygenated blood to the body parts.

Question 8.
How does the spore formation take place?
(OR)
Write about grafting. Give some examples.
Answer:

1. Most of fungi like Rhizopus, Mucor, etc., bacteria, and non-flowering plants such as fern and mosses reproduce by the method of spore formation.
2. In fungi like Rhizopus, sporangium is present. When it burst hundreds of spores spread into air.
3. These airborne spores land on food or soil, under favourable conditions like damp and warm conditions, they germinate and produce new individuals.

4. Non-flowering plants like ferns contain leaf which is also called sporophyll.
5. They bears clusters of sporangia on their lower side.
6. These sporangia produce the spores which produce new plant under favourable conditions.
(OR)
1. Grafting is a method of artificial vegetative propagation.
2. Two plants are joined together in such a way that two stems join and grow as a single plant.

3. One which is attached to the soîl is called stock and the cut stem of another plant is without roots is called a scion.
4. Both stock and scion are tied with help of a twine thread and covered by a polythene cover.
5. After a few days both unite by developing new tissue and grow as a single one.
6. This technique is very useful in propagating improved varieties of various flowers and fruits. E.g.: Mango, citrus, apple, rose.

Question 9.
Draw peristaltic movement of food in stomach. Describe movement of food in stomach.
(OR)
Collect the information about natural pest controlling methods and pictures.
Answer:

1. The stomach acts like a washing machine, churning the food around to break it into even smaller pieces.
2. Mechanical mixing of food in stomach occurs by peristalsis, which is waves of muscular contractions that move along the stomach wall.
3. The contractions of the stomach muscles squeeze and mix the food with the acids and juices of the stomach.
4. The digestive juices turns the food into smooth porridge-like consistency called chyme.
5. As the process of digestion in the stomach nears completion, the contractions of the stomach decrease.

(OR)

1. Some insects control the harmful insects and they are called “friendly insects”.
2. Spiders, Dragonfly, Krisöpa, Minds, ladybirds, Beetle etc., are the insects that eat worms like jasids, trips and stem borers.
3. Trichoderma bacterium lives in the eggs of stem borer, tobacco, caterpillar, gram caterpillar and destroys these pests at the egg stage. ,
4. Bacillus turengensis destroy some pests.
5. “Aakarshaka Patralu” and mixed crop cultivation also control some pests arid diseases.

Part – B (Marks 10)

Instructions:

• Write the answers to the questions under Part – B on the question paper itself and attach it to the answer book of Part – A.
• Each question carries 1 mark.
• Marks will not be awarded in any case of overwriting, rewritten or erased answers.
• Write the capital letter (A / B / C / D) showing the correct answer for the following questions in the brackets provided against them.

Question 1.
These are capable of converting light energy into chemical energy. ( )
A) Heterotroph
B) Amoeba
C) Atitotroph
D) Bacteria
Answer:
C) Atitotroph

Question 2.
Match the following. ( )
List I List II
1) Grass hopper a) Gills
2) Fish b) Trachea
3) Frog c) Skin
A) 1 – c, 2 – b, 3- a
B) 1 – a, 2 – c, 3 – b
C) 1 – a, 2 – b, 3 – c
D) 1 – b, 2 – a, 3 – c
Answer:
C) 1 – a, 2 – b, 3 – c

Question 3.
What is the purpose of the experiment? ( )

A) To test the presence of oxygen in respiration
B) To test the evolution of CO₂ in respiration
C) To test the evolution of heat in respiration
D) To test anabolic activity.
Answer:
B) To test the evolution of CO₂ in respiration

Question 4.
Normal B.P. in man is ‘ ( )
A) \(\frac{120}{80}\)
B) \(\frac{80}{120}\)
C) \(\frac{80}{100}\)
D) \(\frac{100}{80} \)
Answer:
B) \(\frac{80}{120}\)

Question 5.
Excretory organs in birds ( )
A) Flame cells
B) Nephridia
C) Vacuole
D) Kidney
Answer:
D) Kidney

Question 6.
Building up of body material is called ( )
A) metabolism
B) catabolism
C) anabolism
D) both A and B
Answer:
C) anabolism

Question 7.
The outer side of the kidney is ( )
A) concave
B) convex
C) square
D) round
Answer:
B) convex

Question 8.
The weight of the brain in the total weight of the body is about ( )
A) 2%
B) 3%
C) 4%
D) 6%
Answer:
A) 2%

Question 9.
The given picture depicts ( )

A) Female gametophyte
B) Antipodal cells
C) Secondary nucleus
D) Helper cells.
Answer:
C) Secondary nucleus

Question 10.
Consider the following sentences.
a – Production of sperms start from the age 13 in males.
b – Production of ova starts at the same age in females. ( )
A) both a & b are true
B) a is true, b is false
C) b is true, a is false
D) both a & b are false
Answer:
B) a is true, b is false