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kakasveta [241]
3 years ago
15

When Charles Darwin arrived in South America what observation did he make regarding rabbits?

Biology
1 answer:
jeka57 [31]3 years ago
5 0

Answer:

South American Grasslands

Explanation:

When Charles Darwin arrived in South America he noticed that many species including rabbits were missing from the South American Grasslands. Instead he found flightless, ground-dwelling birds called rheas in these grasslands. These animals were not like rabbits but instead shared many similarities to ostriches, and only lived in South America, where ostriches lived only in Africa.

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There are two types of controlled variables: <em>Internal and External.</em>

Internal variables are within the scope of the experiment and can be controlled, whereas external variables are outside the scope of the experiment and we have no control over them.

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So, the way your teacher "chucks" the eggs off the roof should be a controlled internal variable. The action should be done as consistently as possible to avoid an uncontrolled variable.

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