2. Explain how batural selection might have produced the modern giraffe from short-necked ancestors.

Natural selection means survival of the fittest, or the most fit animals for an environment. The most fit animals tend to thrive in their environment better than less fit animals. In this case, a short-neck Giraffe will not be able to reach leaves {its source of food}, causing it to be hungry and unable to eat. Over time, Giraffe's formed longer necks to be able to read tree leaves, making them more fit to survive.

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the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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