waves do not need a medium to travel an example is

What do nitrifying bacteria convert

What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?

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