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Thoeries Of Evolution
Beginning of essay
Evolution is the process by which living organisms originated on earth
and have changed their forms to adapt to the changing environment. The earliest
known fossil organisms are the single-celled forms resembling modern bacteria;
they date from about 3.4 billion years ago. Evolution has resulted ....
Middle of essay
....e often able to change the characteristics of domestic animals by
selecting for reproduction those individuals with the most desirable qualities.
Darwin reasoned that, in nature, individuals with qualities that made them
better adjusted to their environments or gave them higher reproductive
capacities would tend to leave more offspring; such individuals were said to
have higher fitness. Because more individuals are born than survive to breed,
constant winnowing of the less fit-a natural select.... |
| Number of words: 1798 |
Approximate pages: 7 |
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