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Q. In which of the following organisms, the feature of menstrual cycle during sexual reproduction is observed?
(a) Most seasonal breeders
(b) Human females
(c) Old-world monkeys and apes
(d) Tiger

NTA AbhyasNTA Abhyas 2020Human Reproduction

Solution:

The reproductive cycle in the female primates (e.g. monkeys, apes and human beings) is called menstrual cycle. In non-primate mammals like cows, sheep, rats, deers, dogs, tiger, etc., such cyclical changes during reproduction are called oestrus cycle.