In total, how many of the following animals show oestrus cycle and menstrual cycle respectively?
Cow, Human, Gorilla, Tiger, Deer, Dog, Monkey, Rat and Sheep.
6 and 3
The females of non-primate vertebrates like cows, sheep, rats, deers, dogs, tiger etc., show oestrus cycle. Primates like monkeys, apes (eg., gorilla) and humans show menstrual cycle.