PYQ Vault

Day 52: CBSE Class 10 Science

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

  1. Question 1

    Heredity. This type asked 3 times: 2022, 2025, 2026. This one: 2026

    14
    Study the given table and answer the following questions :
    ParentsF1\mathrm{F_1}F2\mathrm{F_2}
    A pea plant with red flowers was crossed with a pea plant with white flowers.30 seeds were sown and all bore plants with red flowers.44 seeds were sown, 33 plants bore red flowers and 11 plants bore white flowers.
    (a) Depict the information given in the table in the form of a cross. (b) Deduce the F2\mathrm{F_2} phenotypic ratio/F2\mathrm{F_2} ratio showing external look as well as genotypic /genetic makeup, ratio.

  2. Question 2

    How do Organisms Reproduce?. This type asked 3 times: 2024, 2025, 2026. This one: 2026

    2
    Identify the type of reproduction shown in the diagram given below :

    Tap an option to check your answer.

  3. Question 3

    How do Organisms Reproduce?. This type asked 3 times: 2023, 2025, 2026. This one: 2026

    16 (b)
    Given below are certain situations. Analyse and describe what would happen when : (i) Spores are liberated from blob-like structures of the bread mould? (ii) Leaves of bryophyllum fall on wet soil ? (iii) A pollen from different species land on the stigma of totally unrelated species ? (iv) Copper-T is placed in the uterus of a human female ? (v) Spirogyra breaks into smaller fragments upon maturation ?

  4. Question 4

    How do Organisms Reproduce?. This type asked 3 times: 2022, 2024, 2026. This one: 2026

    16 (b)
    Radha has three children. She does not want to have more children. Radha visits a nearby hospital, to know the methods to prevent pregnancy. (i) Mention the name of any two ways other than the surgical methods, following which Radha can avoid unwanted pregnancies. (ii) Name the surgical methods to prevent pregnancy. (iii) Give one example each of sexually transmitted diseases caused by bacteria and virus.

  5. Question 5

    Life Processes. This type asked 3 times: 2023, 2025, 2026. This one: 2026

    5
    Select the option that represents the correct balanced equation for the process of photosynthesis :

    Tap an option to check your answer.