Bio ch 34 terms 4

Bio ch 34 terms 4 - the evolutionary tree. Hominins include...

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Eutherian (yu-ther'-e-un) Placental mammal; mammal whose young complete their embryonic development within the uterus, joined to the mother by the placenta. extraembryonic membrane One of four membranes (yolk sac, amnion, chorion, and allantois) located outside the embryo that support the developing embryo in reptiles and mammals. Gnathostome (na´-thu-stom) Member of the vertebrate subgroup possessing jaws. Hominin (ho´-mi-nin) A species on the human branch of
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Unformatted text preview: the evolutionary tree. Hominins include Homo sapiens and our ancestors, a group of extinct species that are more closely related to us than to chimpanzees. Lancelet Member of the subphylum Cephalochordata, small blade-shaped marine chordates that lack a backbone. lateral line system A mechanoreceptor system consisting of a series of pores and receptor units along the sides of the body in fishes and aquatic amphibians;...
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