AP SSC · Class 10

Biological Science Important Questions

High-frequency questions from BSE AP Class 10 Biological Science public exams — all 5 NCERT chapters, matching the General Science Paper II pattern.

Ch. 5 — Life Processes

1Write the equation for photosynthesis. Name the raw materials and the conditions required. Where exactly does it occur in the leaf cell?
2Describe the process of nutrition in Amoeba. How does it differ from nutrition in green plants?
3Draw a neat labelled diagram of the human heart. Explain double circulation with the pathway of blood.
4Describe the structure of a nephron. How does urine form? Name the three processes involved.
5Compare aerobic and anaerobic respiration. What are the products of anaerobic respiration in yeast? Give one practical use.
6Explain how water and minerals are transported from roots to leaves in plants. What force drives this movement?

1Draw a neat labelled diagram of a neuron. Describe how a nerve impulse travels from the receptor to the effector.
2Explain a reflex action with the help of a labelled diagram of the reflex arc.
3Name the parts of the brain and state one function of each. Which part controls balance and posture?
4What are plant hormones? Describe the role of auxin in the bending of a plant shoot towards light.
5How does the endocrine system differ from the nervous system? Name two endocrine glands and the hormones they secrete.
6What happens when adrenaline is released into the blood? Name the gland that secretes it. Why is it called the 'fight or flight' hormone?

1Distinguish between asexual and sexual reproduction. Give two examples of each in animals and plants.
2What is vegetative propagation? Describe any two methods with examples. State one advantage.
3Draw a neat labelled diagram of the longitudinal section of a flower. Name the male and female reproductive parts.
4Describe the process of fertilisation in flowering plants. What happens to the ovule and ovary after fertilisation?
5Draw a labelled diagram of the male human reproductive system. Name the functions of the testes and vas deferens.
6What changes occur in the female reproductive system during the menstrual cycle? What is the significance of menstruation?

1State Mendel's Law of Segregation. Show the cross between a tall (TT) pea plant and a dwarf (tt) pea plant using a Punnett square. What is the phenotypic ratio in F₂?
2How is the sex of a child determined in humans? Draw a cross to show that the father is responsible for the sex of the child.
3Distinguish between dominant and recessive traits with an example. What is the genotypic ratio of a monohybrid cross in the F₂ generation?
4What is a dihybrid cross? State the phenotypic ratio (9:3:3:1) obtained in the F₂ generation of a dihybrid cross.
5Distinguish between acquired traits and inherited traits. Why are acquired traits not passed on to the next generation?
6Define the terms: gene, allele, genotype, phenotype, homozygous, heterozygous.

1What is a food chain? Draw a food chain with four trophic levels. What percentage of energy is transferred from one level to the next?
2What is biomagnification? How does it affect organisms at the top of the food chain? Give one example of a harmful chemical that biomagnifies.
3Distinguish between biodegradable and non-biodegradable substances. Give two examples of each.
4What is the role of decomposers in an ecosystem? What would happen to the environment if decomposers disappeared?
5How does the depletion of the ozone layer affect living organisms? Name the chemicals responsible for ozone depletion.
6What is waste management? Explain how reducing, reusing, and recycling help protect the environment.