PYQ Vault

Day 125: CBSE Class 10 Science

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

  1. Question 1

    Control and Coordination. Asked once: 2023 (same type asked 3 times)

    22 (b)
    What happens at synapse between two neurons ? State briefly.

  2. Question 2

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

    25
    V – I graph for two conducting wires A and B are as shown. If both wires are of the same length and same diameter, which of the two is made of a material of high resistivity ? Give reasons to justify your answer.

  3. Question 3

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

    8
    Consider the following statements : (i) The sex of a child is determined by what it inherits from the mother. (ii) The sex of a child is determined by what it inherits from the father. (iii) The probability of having a male child is more than that of a female child. (iv) The sex of a child is determined at the time of fertilisation when male and female gametes fuse to form a zygote. The correct statements are :

    Tap an option to check your answer.

  4. Question 4

    Heredity. Asked once: 2022 (same type asked 3 times)

    3 OR
    In a cross between red coloured and white coloured flowers, when plants with red coloured flowers of F1 generation were self pollinated, plants of F2 generation were obtained in which 75% of plants were with red flowers and 25% plants were with white flowers. Explain the inheritance of traits in the above cross with the help of a flow chart only along with the ratio of plants obtained.

  5. Question 5

    How do Organisms Reproduce?. Asked once: 2026 (same type asked 3 times)

    16 (b)
    Observe the given diagram and answer the questions that follow : (i) Give the name and type of reproduction shown in the above diagram. (ii) Comment on the processes taking place in stage P. (iii) Name an organism which reproduces by the above mentioned method. (iv) Name the method that can be used to raise plants that have lost their capacity to produce seeds. List any two advantages of growing plants by such a method.