List five key features of mammals and distinguish between monotremes, marsupials, and placental mammals.

Question

ScanSolve AI Tutor · Accepted Answer

1. Five (5) key features common to all mammals: i. Presence of mammary glands for milk production. ii. Presence of hair or fur covering the body. iii. Endothermic (warm-blooded), maintaining a constant body temperature. iv. Possession of a diaphragm for respiration. v. Presence of three middle ear bones (malleus, incus, stapes). 2. Distinguishing between the three (3) types of mammals: SN — Monotremes — Marsupials — Placental Mammals1 — Lay eggs (oviparous). — Give birth to live, underdeveloped young. — Give birth to live, relatively developed young. 2 — Possess a cloaca. — Do not possess a cloaca. — Do not possess a cloaca. 3 — Mammary glands lack nipples; milk secreted through pores. — Mammary glands have nipples, typically within a pouch. — Mammary glands have nipples. 4 — Young develop outside the mother's body in an egg. — Young complete development in a maternal pouch (marsupium). — Young complete development inside the uterus, nourished by a placenta. 5 — Short gestation period, followed by external egg incubation. — Short gestation period, followed by a longer period of development in the pouch. — Long gestation period, with extensive internal development. Example.1 — Platypus — Kangaroo — Human Example.2 — Echidna — Koala — Dog

List five key features of mammals and distinguish between monotremes, marsupials, and placental mammals.

Still stuck on this one?

More Biology Questions