Question
In which one of the following groups of animals, oestrus cycle is not observed?
NDA
General Ability
General Science
2026
NDA 2026 (Phase 1)
NDA General Ability Question (2026) — Solution
Options
- A. Cows
- B. Monkeys
- C. Rats
- D. Tigers
Answer
B. Monkeys
Step-by-step solution
The reproductive cycle in female primates such as monkeys, apes, and humans is called the menstrual cycle. In non-primate mammals like cows, sheep, rats, deers, dogs, and tigers, the reproductive cycle is called the oestrus cycle. Therefore, the oestrus cycle is not observed in monkeys. Answer: Monkeys
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