BISC 120Lg Lecture Notes - Lecture 19: Proterozoic, Cambrian Explosion, Blastula
22 Mar 2016
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*key concepts: animals are multicellular, heterotrophic eukaryotes with this sues that develop from embryonic layers, the history of animal spans more than half a billion years, animals can be characterized by body plans . Most animals are mobile-strength, speed, toxins, camou age to detect and eat other organisms. **chameleon captures insects with long, sticky tongue animals are multicellular, heterotophic eukaryotes with tissues that develop embryonic layers. **several characteristics: nutritional mode: heterotroph sthat ingest their food, cell structure and specialiation: animals are multicelular eukaryotes, lack cell walls, bodies he"d together by structural proteins such as collage, nervous ties and muscle tissue are unique for animals. **tissues are groups of similar cells that act as functional units: reproduction and development: reproduce sexually with deployed stage usually dominating the life cycle. cleavage, blastula, gastrulation: de nes all animals. **********gastrulation leads to formation of ectoderm, endoderm, and gastrula.
