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Ch 15 Biology Theory of Evolution

Dr. J

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Across
3.individuals that are better suited to their environment survive and reproduce
7.members of a species compete with each other for nutrients, space, a mate, and other necessities
9.structures that have different mature forms but are derived from the same embryonic tissues
10.the ability of an individual to survive and reproduce in its specific environment
11.change over time
12.inherited characteristics that increase an organims's chance of survival
13.all living organisms can be found descended from common ancestors
Down
1.living species have descended from other species over time
2.when humans make decisions about breeding programs to increase a trait they value
4.organs that have little or no known function in the living organism
5.a testable explanation of phenomena occuring in our natural world
6.when an organism's ability to survive and reproduce are controlled by its environment
8.preserved remains of ancient organisms

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