BIOL 111 Lecture Notes - Spongin, Phagocytosis, Burgess Shale
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BIOL 111 Full Course Notes
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Bigger cells have a smaller s. a. /v whereas the s. a/v ratio of the smaller one is much bigger. The surface area is important for absorption (oxygen, nutrients, ridding of. Bio 111 alanna houston wastes and co2) also, materials can diffuse throughout smaller cells more quickly: sa relative to volume: decreases as cells get larger, o2 and nutrients cannot get to whole cell. Bio 111 alanna houston: protists and many fungi are haploid dominant, simpler protists have alternation of generations o. Characteristics unique to animals: none of them. About 1. 7 million species classified but estimated ten million. Animal diversification: first animals marine, 1. 2 bya 700 mya. Levels of oxygen started increasing more energy more ability to do new things that would survive. Burgess shale, bc: soft sediment shell and it collapsed and smothered everything beneath it so, discovered in 1909 everything fossilized very well. Sponge morphology is highly variable as well as the places they live in.