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Reproduction in Lower and Higher Animals — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYReproduction in Lower and Higher Animals3 Marks
Question
Give reasons: Human female has restricted reproductive life.
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Answer

  1. In human female, the reproductive period is about 30 – 33 years.
  2. There is menarche at the age of about 13 and menopause at the age of 45-50.
  3. During this span of 30 years, ovaries secrete sex hormones like estrogen and progesterone. After menopause this secretion is suspended.
  4. Due to changes in hormonal level, human females cannot produce eggs later. Moreover, eggs in her ovaries are utilized by the age of 45.
  5. Human female, therefore, has restricted reproductive period.

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