This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
ScanSolve AI 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 Mammals | | :-- | :--------------------------------------- | :------------------------------------------- | :------------------------------------------- | | 1 | 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 | What's next? 📸