Introduction It is a common observation that organ and organ system level of organiza…
9.5.9 General Characteristics of Mammals The name was given by Linnaeus in 1785. The …
9.5.7 Class Reptilia (Latin. Repere; to crawl) Appendages: Either tetrapods and pent…
9.4.1 Fundamental or Basic Characteristics of Chordates All chordates possess three b…
9.4 (a) Phylum Hemichordata (affinities) Hemichordates closely resemble both echinode…