Use arrows to demonstrate the flow of oxygen-rich and oxygen-poor blood through the circulatory and respiratory systems. Use one color to illustrate oxygen-rich blood
and another color to depict oxygen-poor blood

In a certain ecosystem owls are predators for mice. the owl population increases and they eat more mice this causes the mouse population to decrease what happens next? a. the birth of mice increases. b. the birth rate of owls increases c. the population of owls decreases d. the population of mice increases

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks