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How do Organisms Reproduce? — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceHow do Organisms Reproduce?1 Mark
MCQ
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below:
Assertion : The testes are present outside the abdominal cavity of the body.
Reason : Sperm formation requires a lower temperature than the normal body temperature.
  • ✓
    Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
  • B
    Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
  • C
    $A$ is true, but $R$ is false.
  • D
    $A$ is false, but $R$ is true.
✓

Answer

Correct option: A.
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
The testes of a man lie in the small muscular pouch called scrotum outside the abdominal cavity. Being outside the abdominal cavity, the temperature of scrotum is about $2-3^\circ C$ lower than the normal body temperature. It is because the sperm formation requires a lower temperature than the normal body temperature. So, the testes provide an optimal temperature for formation of sperms.

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