What statement could explain why viruses were not the first to evolve?

viruses are parasites
viruses have to infect a living cell in order to reproduce
viruses have no cell membrane
viruses contain either dna or rna

Which of the following occurs most often in a population when genetic variation and overproduction are present? some organisms have a lower reproductive success than others. some organisms have a higher reproductive success than others. some organisms have no reproductive success. some organisms do not have genetic variation.

Fossils can only be formed when? if mud, silt or tar is in the area to preserve the fossil ierosion does not occur and allows the fossil to form oxygen and microorganisms cannot decay the bones the area is dry and does not contain mud or silt

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an