Your heart functions in your body as a(n)
a. series of joints responsible for endurance.
b. organ for absorbing vitamins and minerals.
c. filter for impurities.
d. muscle that to pump oxygen around the body.

What will happen to a population of predators if there is a sudden, temporary increase in the number of prey? a. the population of predators will be uniform with no change. b. the population of predators will increase first and then decrease slowly. c. the population of predators will increase continuously.

To be or not to be that is da question

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil