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Giraffe ancestors with slightly longer necks were able to reach taller food sources; these organisms survived longer and produced more offspring with the favorable variation
A: artificial variation
B: natural variation
C: both

Respuesta :

Answer:

B

Explanation:

Its natural variation because by random mutation some giraffe had longer necks than others. However these longer necks were more favourable and allowed giraffe to survive to reproductive success. Hence the longer necked giraffes had more offspring and this randomly generated trait was passed on to more and more giraffe offspring.

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