AP 10th Class Biology Question Paper June 2023 with Solutions

Teachers often recommend practicing with AP 10th Class Biology Model Papers and AP 10th Class Biology Question Paper June 2023 to enhance exam readiness.

AP SSC Biology Question Paper June 2023 with Solutions

Time : 2.00 hours
Max. Marks: 50

Instructions :

1. Question paper consists of 4 sections and 17 questions.
2. Internal choice is available only for Q.no. 12 in section III and for all the questions in section IV.
3. In the duration of 2 hours, 15 minutes of time is allotted to read the question paper.
4. All answers shall be written in the answer booklet only.
5. Answers shall be written neatly and legibly.

SECTION – 1
(6 × 1 = 6 M)

Note :

1. Answer all the questions.
2. Each question carries 1 mark.

Question 1.
Give an example of a plant parasite.
Answer:
Cuscuta / Dodder

Question 2.

Organism Phylum	Excretory Organs
1. Platyhelminthes	Flame cells
2. Reptiles, Birds, Mammals	Kidneys

a) What are the excretory organs in platyhelminthes?
Answer:
Flame cells

b) Excretory organs in man ___________
Answer:
Kidneys

Question 3.
Identify the following diagram :

Answer:
Villus

Question 4.
Identify the correct pair :
a) Charles Darwin – Natural Selection Theory
b) Jean Lamarck – Law of Dominance
Answer:
a) Charles Darwin – Natural Selection Theory

Question 5.
Suggest an eco-friendly method to control crop pests.
Answer:
Rotation of crops method.
Biological control methods
Sterility method.

Question 6.
Ask two questions to your Biology teacher about conservation of forests.
Answer:

1. What is the necessity of forest conservation?
2. Flow do forests influence the biodiversity?

SECTION – II
(4 × 2 = 8 M)

Note :

1. Answer all the questions.
2. Each question carries 2 marks.

Question 7.
What are the consequences if the kidneys do not function properly ?
Answer:

1. Body filled with excess water and waste products.
2. Hands and feet may swell.
3. The patient feels tired and weak.

Question 8.
Study the following table:

Female/Male	Surgery Process	Birth Control Method
1. Female	removal of a small portion of oviducts and cut ends are tied	Tubectomy
2. Male	removal of a small portion of sperm ducts	Vasectomy

Now answer the following questions:

a) What is the birth control method in females?
Answer:
Tubectomy

b) What is the process of surgery in males to control birth ?
Answer:
Vasectomy

Question 9.
What are the four types of teeth in man ?
Answer:

a) Incisors
c) Pre molars
b) Canines
d) Molars

Question 10.
Ask any two questions to your teacher to know the relationship between the taste and smell of food.
Answer:

1. Why do we fail to taste while suffering with cold?
2. How could we say that taste and smell are correlative?

SECTION – III
(5 × 4 = 20 M)

Note :

1. Answer all the questions.
2. Each question carries 4 marks.

Question 11.
Study the following table :

Alkaloid	Plant	Plant part	Use of alkaloid
1. Quinine	Cinchona	Bark	Cures Malaria
2. Reserpine	Snake root	Root, bark	Medicine for snake bite
3. Nimbin	Neem	Seed, bark, leaf	Antiseptic
4. Scopolamine	Datura	Fruit, flower	Sedative
5. Pyrethroids	Tridax	Flower	Insecticide

Now answer the following questions :

1) Which parts of Neem plant produce nimbin ?
Answer:
Seeds, bärk and leaf

2) Which alkaloid acts as insecticide ?
Answer:
Pyrethroids

3) Which alkaloid is produced by Datura plant ?
Answer:
Scopolamine

4) Which alkaloid cures malaria ?
Answer:
Quinine

Question 12.
Draw and label the diagram of a human sperm cell.
Answer:

(OR)

Draw a neat labelled sketch of chloroplast.
Answer:

Question 13.
Describe the structure of a nerve cell.
Answer:

1. Nerve cell has three parts – Cyton, dendrites and axon.
2. Cyton contains large and round nucleus and abundant cytoplasm with nissal granules.
3. Dendrites are short and branched.
4. Axon is long and cylindrical.
5. In some nerve cells»axon is surrounded by a layer known as myelin sheath.
6. The intervals of myelin sheath are known as nodes of ranvier.

Question 14.
What is an Ecological Pyramid ? What are the types of ecological pyramids ?
Answer:
Ecological pyramid:

1. The graphical representation of the feeding level (tropic level) of an ecosystem by taking the shape of a pyramid is called “Ecological Pyramid”.
2. There are three types of Ecological Pyramids. They are

• Pyramid of Number.
• Pyramid of Biomass.
• Pyramid of Energy.

Question 15.
Give four suggestions to use fossil fuels like petroleum, coal, natural gas etc. economically.
Answer:

1. Turn off lights and other electronics, when you are not using them.
2. Purchase energy-efficient appliances.
3. Walk, ride a bicycle
4. It is better to prefer public transport system like bus (or) train instead of travel in personal vehicles for long journeys.

SECTION – IV
(2 × 8 = 16 M)

Note:

1. Answer all the questions.
2. Each question carries 8 marks.
3. Each question has internal choice.

Question 16.
A) Describe the process of Coagulation of Blood.
Answer:

1. Blood platelets play an important role in blood clotting.
2. When blood vessels are injured, the platelets release an enzyme called thrombokinase.
3. Thrombokinase acts on another substance called prothrombin and converts it into thrombin.
4. Thrombin acts on another substance called fibrinogen and converts it into insoluble fibrin.
5. The blood cells entangle in the fibrin fibres forming the clot.
6. The fibrin fibres are attached to the edges of wound and pull them together.

(OR)

B) Explain the process of sex determination in Man.
Answer:

1. There are 23 pairs of chromosomes in humans.
2. Of these 23 pairs, 22 pairs are autosomes and these are common both in male and female.
3. Remaining one pair is allosomes or sex chromosomes.
4. The ova produced by females contain ‘X’ chromosome and the sperm cells produced by the males contain either ‘X’ or ‘Y’ chromosomes.
5. If the sperm cell which contains ‘X’ chromosome fertilizes with the ovum, the resultant baby will be “Female”.
6. If the sperm cell which contains ‘Y’ chromosome fertilizes with the ovum, the resultant baby will be “Male”.

Question 17.
A) Write an experiment to prove that oxygen is evolved during photosynthesis in the presence of light.
Answer:
Aim :
To prove that oxygen is evolved during photosynthesis in the presence of light.

Materials required :
Glass beaker, test tube, glass funnel, Hydrilla / Elodea twigs, water, matchstick/ incense stick.

Procedure:

1. Place some water plant like Hydrilla or Elodea in a short stemmed funnel and keep it in a beaker.
2. Then pour some water in the beaker.
3. Invert a test-tube full of water over the stem of the funnel.
4. See that the level of water in the beaker is above the level of stem of the inverted funnel.
5. Make two identical sets in the above procedure.
6. Place one apparatus in the sun and other one in the dark for at least 2-3 hours.

Observations:

1. In the setup in sun, in place of water there is air that fills the test tube.
2. It is not happening in the set up that is placed in dark.
3. When the gas in the test-tube is tested by inserting a glowing match stick/incense stick it would bum into flames.

Result:
It is proved that oxygen is evolved during photosynthesis in the presence of light.

(OR)

B) Observe the experiment and answer the questions.

i) What is the aim of this experiment ?
Answer:
To prove that heat is liberated during respiration.

ii) Which materials are required to conduct this experiment ?
Answer:
Thermos flask, thermometer, germinating seeds, rubber cork.

iii) What kind of seeds do you use to get better results in the experiment ?
Answer:
Germinating seeds.

iv) What is your observation in this experiment ?
Answer:
Temperature increases throughout the experiment in the thermometer.