Answer:
A
Explanation:
A. when there is a variation or mutation there might be the chance that they develop a way to eat plants that they normally would not be able to. If and when they survive they reproduce passing on the genes to there offspring and so on. if the mutation is bad then the animal will die therefore not passing on there genes.
It is a homeostatic response from the body in order to increase the body temperature and circulate blood to the entire body. Muscle contractions or shivering helps to contract and relax muscles and blood vessels allowing blood to continue flowing
a combined transmitter and receiver called a transducer sends a sound pulse straight down into the water and the pulse moves through the water and bouces off the ocean bottom so that the transducer is able to pickup the reflected sound
Sedimentary and metamorphic rocks?