BIOL 117 Lecture 14: Chapter 14 - Animal Form
23 Jul 2016
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If growing in stream with predator, shell grows at angle. Includes great ability to be exible in environment. They"re imperfect: involve evolutionary trade-offs, changing environment (selected to do well in parent"s environment, not their own) Red tail hawk: lays 1-2 eggs, lay 1st and incubates, 2nd and incubate, rst will be ahead in development than 2nd. Problem with scarce food, if not enough food the 2nd usually driven into starvation by 1st due to competition. Limits, can"t really change: single vs. multiple cells, small vs. large body, generalist (use several resources) vs. specialist (use one or two resources), usually refers to food. Inability to extract nutrient from other plants so would die without eucalyptus: quality vs. quantity offspring. Evolutionary change = change in scale **biological hierarchy** Monday, october 26, 2015: cell increased in size, tissue formed by cells sticking togetheri, organs created by tissues, organ systems, organisms.
