MCQ
Menstrual cycle is generally of______________.
- A21 days
- B28 days
- C38 days
- D40 days
Explanation:
The menstrual cycle is the rhythmic reproductive cycle that occurs in the uterus and ovary.
The length of a menstrual cycle varies greatly among women but the average length of a cycle is 28 days.
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$I$. Species diversity provides stability to the ecosystem
$II$. Communities with more species tends to be more stable than those with less species
$III$. Ecosystem with higher biodiversity are more productive than the ecosystem with lower biodiversity
$IV$. Biodiversity is not essential for the maintenance and health of ecosystem
Choose the correct option