Using a total of only five organs, design a digestive system that can absorb the maximum number of Calories from the apple. Describe your system below.

Why is excretion necessary to maintain homeostasis?

How does photosynthesis show the conservation of mass and energy?

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