Zoology notes

This phylum contains marine deuterostome animals. They are sometimes considered as the sister group of phylum Echinodermata. Phylum Hemichordata is a small phylum with only a 100 known species, with animals having a worm-like appearance. Some species may be solitary or some occur in colonies. Let us study them further.

<p class="lead">The turtle’s most obvious physical attribute is its shell. Other prehistoric reptiles developed similar shells, but for whatever reason did not survive and diversify in how turtles did. The shell which in most turtles comprises two hard plates, protects the turtle’s v

Zoology Ch. 17 Gene Expression Lecture Notes. I use different colors because it's easier to see and find things when doing homework and studying for quizzes and tests.