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Evolution

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Across
4.Mammals having a placenta
5.structures that are embryologically similar, but have different functions
6.The state or process of ceasing or causing something to cease to exist
7.occurs when closely related species experience quite different environments
10.The action or process of adapting or being adapted
11.The changing of the structure of a gene
12.a mammal whose members are born incompletely developed and are typically carried and suckled in a pouch
13.The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.
14.shows how evolution started
15.seemingly functionless parts
Down
1.embryos of different species develop almost identically
2.occurs when two relatively unrelated species develop similar structures
3.The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water
8.gives an age of a sample based on the amount of radioactive carbon that is in a sample
9.The genetic constitution of an individual organism

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