How are monetremes different from other mammals?How are they the same?

Answer 1

Monotremes are set apart from other mammals by two main differences: they lay eggs and they have only a single excretory orifice, the cloaca. Other mammals give birth to live young and females have a separate vagina, eurethra, and anus. However, monotremes are similar to other mammals because they are warm-blooded, have hair on their bodies, produce milk to feed their young, have a single bone in their lower jaw, and have three bones in their middle ears.

Answer 2

Monotremes lay eggs rather than giving birth to live young but they still suckle their young once they are hatched with milk. Monotremes are the most primitive mammals. There are three species of monotremes, the duck-billed platypus (Ornithorhynchus) and two spiny anteaters, or echidnas (Tachyglossus and Zaglossus). These mammals lay eggs; after the babies hatch, the mothers nourish their young with milk. Today, monotremes live only in Australia and New Guinea. The name monotreme means "one-holed," referring to the cloaca, a single hole that serves the urinary tract, anus, and reproductive tract in monotremes.

Reproduction: Monotremes lay tiny eggs (less than 2 cm long) that have a leathery shell. The young get milk from a gland on the mother's belly. The platypus lays her eggs on the bank of a stream, then curls around the eggs to protect them and keep them warm. Spiny anteaters lay a single egg in a temporary protective pouch on the mother's belly.

Anatomy: Monotremes have hair like other mammals, and the females produce milk. They have a low metabolic rate and a temperature slightly lower than that of placental mammals. they're hatched with milk.

Answer 3

Monotrenes lay eggs, unlike other mammals, yet they nurse their young, are covered with hair and have warm blood.