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In conclusion bugs have shrunk down in size due to the atmosphere and predators. Sources https://www.thoughtco.com/why-were-prehistoric-insects-so-big-1968287       http://earthsky.org/earth/why-were-prehistoric-insects-so-huge                   https://news.nationalgeographic.com/news/2011/08/110808-ancient-insects-bugs-giants-oxygen-animals-science/

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period 6

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insects where at their biggest point during Paleozoic era. Dragon fly's had a wing span of up to two feet.The reason they where so big was because there body's could take in more oxygen because there where higher levels of it. Your cells need oxygen to grow so the more oxygen the bigger you are.

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The number one reason that the size in bugs have changed is because of the atmosphere. Millions of years ago the atmosphere contain a lot more oxygen witch is important because bugs don't have lungs the air was also more moist. The second reason they got smaller was because of predation of big birds and flying dinosaurs.

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why are the bugs and animals getting smaller, do humans affect the size in bugs and animals in any way?

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Is the process of change in the sequence composition of cellular molecules such as DNA, RNA, and proteins across generations.

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Organs that you can live without.

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Is an example of an organ or bone that appears in different animals.

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Variation in the relative frequency of different genotypes in a small population.

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The choosing of a mate by witch is the biggest prettiest and toughest.

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Divergent Parallel and Convergent evolution

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Divergent Parallel and Convergent evolution

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Divergent- different
parallel- similar
convergent- different species similar look.

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The movement and exchange of genes or alleles from one population of species to another.

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The changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations.

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The process whereby organisms better adapted to their environment tend to survive and produce more offspring.

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V- Variation
I- Inheritance
S- Selection
T- Time