Organisms that have similar structures are often evolutionarily related. The limbs of a human, wings of a bat and flippers a whale are all similar. These anatomical similarities
are known as

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. once a virus gains entry into the body, it invades a host cell in order to? a. synthesize antibodies for defense b. deactivate the host cell's defenses c. access cell processes for reproduction d. metabolize host proteins and grow