Question

Primates are distinguished from other mammals by having: A. longer pregnancies & periods of infant dependency. B. aquatic capabilities. C. shorter periods of dependence on parents. D. giving birth to live young

Answer 1

Answer: Option A

Longer pregnancies and periods of infancy dependent.

Explanation:

Primates are group of mammals that belong to order primates and are found all over the world.

Primates include lemurs, apes,gorilla, humans, monkeys e.t.c.

They have larger brains and reliance on visual acuity which is the dominant sensory system. Primates have longer period of growth between birth to adulthood and they have longer gestation periods compared to other mammals.

They have longer period of pregnancies e.g humans is 9 months and they take care of their infants till they grow and can provide for themselves.

The infancy depend on them for essentials of life and they are care giver.

Answer 2

Answer:

A. longer pregnancies & periods of infant dependency

Explanation:

Primates are known to mature slowly compared to other mammals, they have a longer gestation period and longer period of infant dependency. Therefore the period between birth and adulthood is usually longer compared to other mammals, which then result to late age in their first reproduction.

For example humans have a gestation period of 365 days while baboons is 187 days compared to rabbits with a gestation period of about 33 days or  mice with a gestation period of about 20 days

Of any primate, humans exhibit the longest period of infant dependency, Chimpanzee is about 5 years compared to other mammals.