Day 89: CBSE Class 10 Science
5 questions. Try each one first, then open its answer.
Question 1
Heredity. Asked once: 2025 (same type asked 3 times)
30A pure pea plant bearing terminal flowers was cross-pollinated with a pure plant having axillary flowers. In generation, plants with axial flowers only were obtained. generation plants are self-pollinated and generation is obtained. (a) Work out the pattern of inheritance in this case. (b) What will be the ratio of plants obtained in generation ?Question 2
How do Organisms Reproduce?. Asked once: 2026 (same type asked 3 times)
16 (a)Observe the given diagram and answer the questions that follow : (i) Give the name of the structure and type of reproduction shown in the above diagram. (ii) State one advantage and one disadvantage of the above mentioned method of reproduction. (iii) Give reason : Asexual reproduction lacks genetic variation. (iv) Why have higher organisms resorted to sexual reproduction in spite of its complexity ?Question 3
How do Organisms Reproduce?. Asked once: 2025 (same type asked 3 times)
35 (A)(i) What is regeneration? Give one example of an organism that shows this process and one organism that does not. Why does regeneration not occur in the latter? (ii) Water in a pond appears dark green and contains filamentous structures. Name these structures and the method by which they reproduce. Explain the process.Question 4
How do Organisms Reproduce?. Asked once: 2024 (same type asked 3 times)
29(a) List any two contraceptive methods practised only by women. Mention how these methods work. (b) Write the two roles performed by testes in human males.Question 5
Life Processes. Asked once: 2026 (same type asked 3 times)
12Given below is a diagrammatic representation of cross-section of a leaf : (i) Identify ‘P’ in the given diagram and write down its role in plants. (ii) Write down a balanced equation of process of photo-synthesis.