Day 12: CBSE Class 10 Science
5 questions. Try each one first, then open its answer.
Question 1
Control and Coordination. Asked 3 times: 2023*, 2024*, 2025 (* = numbers or wording changed that year)
22(a) How is brain protected in our body ? (b) A doctor finds in one of his patients that he is not maintaining a proper posture and balance of his body. State the region of brain and also the part of brain which is responsible for it.Question 2
Control and Coordination. Asked 3 times: 2023*, 2024*, 2025 (* = numbers or wording changed that year)
29(a) What is meant by reflex arc ? Where are they formed in the human body ? (b) Why have reflex arcs evolved in animals ?Question 3
Heredity. Asked 3 times: 2022*, 2024*, 2025 (* = numbers or wording changed that year)
24“Sex of the children is determined by type of sex chromosome which they inherit from their father.” Justify the statement.Question 4
How do Organisms Reproduce?. Asked 3 times: 2022*, 2024*, 2025 (* = numbers or wording changed that year)
35 (a)(a) Name the method by which Amoeba and Leishmania reproduce. Write a major difference in the way they divide to produce new individuals. (b) What is asexual reproduction ? Explain the process of budding in Hydra. (c) Give two methods used to grow rose and jasmine plants by vegetative propagation.Question 5
How do Organisms Reproduce?. Asked 3 times: 2023*, 2024*, 2025 (* = numbers or wording changed that year)
35 (B)In human female reproductive system state the changes that take place once fertilisation has taken place. Write the role of placenta in this process. What happens when the egg is not fertilised ?