BISC208 Lecture Notes - Lecture 2: Pyramidalis Muscle, Paranasal Sinuses, Plantaris Muscle

• School: University of Delaware
• Department: Biological Sciences
• Course: BISC208
• Professor: Hlousek- Radojcic Alenka

Document Summary

Vestigial structures: structures an organism possesses from an ancestor but does not use. Dodo, emu and penguin wings: can be an organ, a structure in an organism that has lost all or most of its original function in the course of evolution, such as human appendixes. Pelvis in whale: vestigial organs in humans. Population inferences: overproduction of offspring/food and resources are limited/ Individuals within a population compete for limited resources: individuals vary within populations/ many variations have genetic basis. Hereditary characteristics may contribute to some individuals survive longer and reproduce: a population characteristic will change over many generations as advantageous heritable characteristics become more common. (because of hereditary characteristics may contribute to some individuals survive longer and reproduce and. Individuals within a population compete for limited resources) Population= unit of evolution: variation selection time. 2: survival acts as motivation and causes evolution bases on environment. Sherpas at high altitudes versus low altitudes sources of variation: mutation.