Nikki dove into a pool and swam underwater. The table shows how her depth changed during a 4-second time period.

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

What is the function of nucleic acids

Cell specialization occurs by the process ofa. reproductionb. differentiationc. maturationd. growth