Ashark's skeleton is different from a goldfish because
a. the shark's skeleton is very dense.
b. the shark's skeleton is quite rigid.
c. the shark's skeleton is composed of bone.
d. the shark's skeleton is composed of cartilage.

Rue or false siblings look simila rbecause they each have some traits of their parents.

Name the part of the the brain labeled "e".

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.