Question

Menstrual cycle exhibited by

• A. Tiger
• B. Cow
• C. Rat
• D. Apes

Answer 1

The Correct Option is D

Apes, which include species such as chimpanzees, bonobos, gorillas, and orangutans, undergo menstrual cycles. During the menstrual cycle, these species experience hormonal changes that result in the shedding of the uterine lining (menstruation) if fertilization and pregnancy do not occur.

Tigers, cows, and rats do not exhibit a menstrual cycle. Tigers and cows have reproductive cycles that involve estrus or heat, where they show specific behaviors indicating their readiness to mate. Rats, on the other hand, have a different reproductive cycle called an estrous cycle.

Therefore, the correct answer is (D) apes.

Answer 2

The correct answer is:

Option 4: Apes

Explanation:

The menstrual cycle is a reproductive cycle seen in some mammals, including humans and apes (such as chimpanzees, gorillas, and orangutans). During the menstrual cycle, the uterus undergoes changes in preparation for a potential pregnancy, and if pregnancy does not occur, the endometrial lining is shed through menstruation.

The other options are incorrect because:

Tiger (Option 1): Tigers, like other non-human mammals such as cats, have an estrous cycle, not a menstrual cycle. In the estrous cycle, the endometrial lining is reabsorbed if pregnancy does not occur.

Cow (Option 2): Cows also have an estrous cycle, not a menstrual cycle.

Rat (Option 3): Rats have an estrous cycle as well.

Thus, the menstrual cycle is exhibited by apes.