in a 1990 study, researchers used viral infection to introduce a gene for the gamma-c subunit of the cytokine receptor into individuals who were genetically deficient for this enzyme. although many of the research subjects showed improvement, three subjects developed leukemia as a result. in these cases, the gene therapy had what undesirable side effect?

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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i think the answer would be d