OBJECTIVE LIFE SCIENCE
DIVERSITY AMONG LIFE FORMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They have hair
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They are ectothermic
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They lay eggs
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They do not feed milk to their young
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Detailed explanation-1: -Why then are they considered mammals you may be wondering? Like other mammals, monotremes are warm-blooded. They have hair on their bodies and produce milk to feed their young. In echidnas, the female lays eggs into a pouch of skin on her stomach, where she carries them until they hatch.
Detailed explanation-2: -All marsupials have pouches, but not all the monotremes do have it. Monotremes lay eggs but not marsupials. Monotremes have a subnormal temperature and a lower metabolic rate compared to marsupials. There are almost 500 species of marsupials, but the number of monotreme species is only five.
Detailed explanation-3: -Eggs and Lactation However, unlike reptiles, female monotremes retain their eggs for some time (typically for two or three weeks) and actively provide the eggs with nutrients. Female platypuses lay their eggs in burrows. Echidna females have a pouch in which they store their eggs and later nurse their young.