PYQ Vault

Day 159: CBSE Class 10 Science

5 questions. Try each one first, then open its answer.

  1. Question 1

    Life Processes. Asked once: 2024 (same type asked 3 times)

    Two statements are given, one labelled Assertion (A) and the other labelled Reason (R). Select the correct answer from the options given below.
    18
    Assertion (A) : Most of the plants close their stomata at night. Reason (R) : Closing of stomata helps to conserve water as large amount of water evaporates from the leaves.

    Tap an option to check your answer.

  2. Question 2

    Life Processes. Asked once: 2025 (same type asked 3 times)

    10
    Parasitic mode of nutrition is observed in :

    Tap an option to check your answer.

  3. Question 3

    Life Processes. Asked once: 2024 (same type asked 3 times)

    29 (a)
    Give reasons for the following : (i) Alveoli in lungs are richly supplied with blood capillaries. (ii) Respiratory pigment in the blood takes up oxygen and not carbon dioxide. (iii) During anaerobic respiration, a 3-carbon molecule is formed as an end product instead of CO2\mathrm{CO_2} in human beings.

  4. Question 4

    Life Processes. Asked once: 2023 (same type asked 3 times)

    29 (a)
    (i) State the role of ATP in cellular respiration. (ii) What ensures sufficient exchange of gases in plants ? (iii) State the conditions on which the direction of diffusion of gases in plant depend upon.

  5. Question 5

    Life Processes. Asked once: 2026 (same type asked 3 times)

    12
    Briefly mention the steps in double-circulation through human heart.