Blood glucose levels are regulated by which organ?
A) heart
B) blood vessels
C) kidneys
D) pancreas

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

Which codon is the code for the amino acid histidine (his)?

What are some possible short and long term medical concerns for crew members on longer space exploration trips