L 3.5.2 Test (CST): Computer-Scored Unit Test Question 3 of 25
Which is part of the theory of evolution by natural selection?
A. Animals that survive cannot pass along their adaptations.
B. Adaptations cannot be passed along to the next generation.
C. Evolution can only cause small changes to a species.
D. Only the best-adapted animals in a population survive.
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The answer is option D.

Only the best-adapted animals in a population survive

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D. only the best-adapted animals in a population survive.

Explanation:

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Prefixes are used to modify the basic unit

Explanation:

The prefixes of any unit of the metric system signify a unit either larger or smaller than the base unit. It can be said that the prefixes are used as modification of the base unit

For example  

Second is the base unit of time (as per the MKS system)

If we add prefix “mili” the unit of time will become millisecond and this signifies a unit which is smaller than second as

1 second = 1000 milisecond

Like wise there are other prefixes such as micro, nano etc.