Someone suggested that everything to be sent to the base on moon must be sterilized so that no bacteria of any kind are present. Do you thing this is a good idea?

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain

The function of the excretory system is to control homeostasis and

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