All plant and animal groups existing together and the physical factors with which they interact compose a(n)

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 a codon and where is it found

In a cladogram' when does a group of organisms branch off