Aresearcher was studying mutations in bacteria. he found that certain bacteria had changes in their dna that allowed them to be resistant to antibiotics. this research is an example of . the mutation will lead to

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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the fossil record provides evidence of a common ancestor to many species.