BIOLOGY 1M03 Lecture Notes - Lecture 19: Ascidiacea, Bilateria, Algae
17 Sep 2016
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Document Summary
Two major phylogenetic groups in animals: protostomes and deuterostomes. Protostomes: insects, crustaceans (crabs and shrimp) and molluscs (clams and snails) Deuterostomes: sea stars to the vertebrates, including human. Heterotrophs obtain the chemical energy and carbon compounds they need from other organism e. g animals. Pirmary producers photosynthetic protests and bacteria which form the base of the food chain in most marine environments. Consumers hetererotorphs eat producers and other organism. Animals: are a monophyletic group of multicellular eukaryotes only lineage on the tree of life with speices that have muscle tissue and nervous tissue no animals undergo alternation of generations. Body plan animal"s architechture major features of its structural and functional design. Sponges are the only group of animals that lack tissues. Tissues tightly integrated structural and functional units. Diploblasts ( two-sprouts ) animals whose embryos have two types of tissues. Triploblasts ( three-sprouts ) animals whose embryos have three types of tissues. Embryonic tissues are organized in layers called germ layers.
