Which of the following describes how the circulatory and excretory systems work together to maintain homeostasis? a. by delivering oxygen to cells b. by having cells that fight infections c. by delivering nutrients from food to cells d. by carrying waste to the kidneys

Diagram of the evolution of land plants?

The hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.

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