Which pathogen depends on living cells to reproduce?

a. protist

b. virus

c. bacterium

d. fungus

The best answer is B. Virus or viruses are completely contingent on host cells for reproducing or reproduction. Viruses are not capable of reproducing on their own. However, most biologists does not consider virus or viruses as a form of life.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.