Answer:
d, b, c, d, a
Explanation:
i got a 100 on the test and i'm positive these are the correct answers u can trust me. some of my questions are a little different but you can fill in the blanks.
Endoskeleton is the internal support of the structure of an organism. an exoskeleton is the external support
Hormone Signaling. The glands of the endocrine system secrete hormones directly into the extracellular environment. The hormones then diffuse to the bloodstream via capillaries and are transported to the target cells through the circulatory system.