In which organism will pharyngeal arches be visible in the embryonic stage? (barnacle, fish, caterpillar, or snail? )

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.

How do diseases caused by bacteria and diseases caused by viruses react to antibiotics?

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a.control b.hypothesis c.procedure d.system