Question

Non Primate mammals have
A. Menstrual cycle
B. Oestrus cycle
C. Breeding seasons
D. Non breeding seasons

Answer 1

Hint: Non-primates mammals are referred to those mammals which do not hold the characteristics that are found in a primate. Birds, reptiles, amphibians, and some mammals are known as non-primates. Generally, the thinking ability and intelligence of non-primates are lower than primates.

Complete answer:
The animals which do not bear the features of a primate are called non-primate animals. The common example of non-primates are birds, reptiles, amphibians, etc. There are some mammals that are also considered as non-primates.
Generally, in non-primates, the non-prehensile limbs or tails are found. The jointed appendages present in some non-primates represent like that as the insects. The shoulders and hips are not flexible in non-primates. The major characteristics studied in the non-primates are that the forebrain is small. As a result, the thinking ability and intelligence of non-primates are much lower than primate animals. There are some features of the non-primates which have similarity with the features of primates. The anatomic structure and the physiological process are those features, which are found similar in both primates and non-primates.
The menstrual cycle is the reproductive process which is found in female primate animals. In this process, certain changes occur in order to facilitate pregnancy and promote implantation of the fertilized zygote. The different types of changes are under the control of certain hormones. If fertilization does not occur, a sudden fall in the levels of certain hormones brings about disintegration of the blood supply of the uterus and results in menstrual flow.
On the other hand, the reproductive process of non primate animals is known as the oestrus cycle. No menstruation takes place in non-primates. In non-primates, the oestrous cycle is a set of physiological changes brought about by the reproductive hormones and are recurring in nature. It starts after sexual maturity in females and only interrupted by pregnancies. Females are generally active only during the oestrous phase of the cycle which is referred to as ‘in heat’.

Therefore, the correct option is option B.

Note: Non primates are the animals which do not hold the features similar to that of the primates animals. Though the anatomical and other physiological structure has a very close similarity between primates and non-primates, there are several differences seen between these two types of animals as primates have a menstrual cycle but non-primate does not. There is no menstruation noticed in non-primates and instead they have an estrous cycle.