Write the collected information about reptilian and mammalian characters of echidna or platypus.
Answers
Explanation:
Platypus and echidna is a group that forms a link between reptiles and mammals. Think and write a characteristic feature that these would have.
Answer:
The class Mammalia is divided into three subclasses namely, placentas, monotremes, and marsupials. Compared to other mammalian types, monotremes have structural differences in the bone in the jaw, digestive tract, reproductive tract, and other body parts. All mammals give birth to their baby by carrying the embryo in the uterus but in monotremes, they give birth to their young ones by laying the eggs which is one of the characteristic features of amphibians and reptiles. Even though they give birth to their young ones by laying eggs they feed the baby with milk secreted by mammary glands covered by the skin because nipples are absent in them.
The only surviving species of monotremes are platypus and echidna found in New Geneva and Australia.
The absence of corpus callosum is one of the characteristic features of amphibians and reptiles which is present in all mammals. It is the communication link between two cerebral hemispheres of the brain.
Unlike mammals, monotremes have a single opening for both excretion and reproduction.
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