Comparing the two phylogenies below, we can conclude that -Reptiles -Therians -Platypuses Endothermy, lactation Teats, viviparity (ive birth) - Reptiles -Platypuses -Therians Endothermy, lactation Electroreceptors, webbed feet, venom, etc. Zimmer/Emlen, Evolution: Making Sense of Life, 3e, © 2020 W. H. Freeman and Company a) platypuses are the ancestor of therians. b) therians are more primitive than platypuses. c) the two phylogenies show the same evolutionary relationship. d) therians are more derived than platypuses.

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Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.