CBSE 2025 · Region 4 · Set 1 · Q35 · 5 marks
(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.(i)Name the part performing following functions in human male reproductive system :(a)Carries sperm(b)Production of male gametes(c)Whose secretion makes the transport of sperms easier(d)Provide suitable temperature for sperm formation(ii)Write any two characteristics of sperms.(iii)What are surgical contraceptive methods? Give the side effect caused by this procedure.
(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.
(i)
Name the part performing following functions in human male reproductive system :
(a)
Carries sperm
(b)
Production of male gametes
(c)
Whose secretion makes the transport of sperms easier
(d)
Provide suitable temperature for sperm formation
(ii)
Write any two characteristics of sperms.
(iii)
What are surgical contraceptive methods? Give the side effect caused by this procedure.
Marking-scheme solution
(i)
Regeneration: The ability to give rise to new individual organism from their body parts / If the individual is somehow cut or broken up into many pieces, then each piece grows into a new organism.
(ii)
(i)
(a) vas deferens
(b) testes
(c) prostate gland/ seminal vesicles
(d) scrotum
(ii) Consists of genetic material, has a tail for movement, small in size.
(iii)
Vas deferens in the males and fallopian tube in females is blocked to prevent fertilization.
Can cause infections if not performed properly.
How do Organisms Reproduce?Asexual ReproductionUnderstandlong_answermedium
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CBSE Class 10 Science past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.