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Oestrous Cycle

In non-primat...

Question

In non-primate mammals like cow, sheep, rat, dog etc.,cyclical changes occurring during their reproductive phase is called

A

Growth cycle

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B

Oestrus cycle

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C

Menstrual cycle

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D

Gestation period

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Solution

The correct option is B Oestrus cycle
Sexual reproduction in mammals involves cyclic changes in the ovaries, accessory glands and the reproductive hormones, during which ovum is released. In non-primate animals it is called oestrus cycle and inprimates including human beings it is called menstrual cycle.

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Q. In non-primate mammals like cow, sheep, rat, dog etc.,cyclical changes occurring during their reproductive phase is called

Q. In non-primate mammals the cyclical changes that occur during reproductive phase are called __________.

Q. In non-primate mammals the cyclical changes that occur during reproductive phase are called __________.
[1 mark]

Q. Assertion: In non-primate mammals, cyclical changes that occur during reproduction is called oestrus cycle whereas in primates, it is called the menstrual cycle.
Reason: The females of placental mammals exhibit cyclical changes in the activities of ovaries and accessory ducts as well as hormones during the reproductive phase.

Q. Choose the correct statement/statements from the following statements.
I) Cyclical changes that occur during reproduction in primates is called the menstrual cycle.
II) Bamboo species flower only once in their lifetime, generally after 50-100 years, produce large numbers of fruits and die.
III) Many mammals, especially those living in natural, wild conditions exhibit oestrus cycle only during favourable seasons in their reproductive phase and are called continuous breeders.
IV) During the reproductive phase, there are concomitant changes in the body like slowing of metabolism.

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