Which answer is not a mechanism for evolution?

mutations
natural selection
genetic drift
gene pool

Option D, Gene Pool

Explanation:

A Gene pool is just a data base of all available genes of any specific species with in a set of population . It no where talks about  genetic change/ evolution of an species in the population.

Mutation is the change in the base pair (nucleotide bases) of a DNA, Natural selection is the way by which an species evolve and genetic drift is the change in existing genes due to random sampling of species.  

Among all given options, option D (gene pool) is not a mechanism for evolution

Hence, option D is the correct answer.

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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answer by yourhope:

answer is

human impact on the environment can be seen in the deterioration of the !

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