A sailor notices that during every long voyage he and his crew suffers from bleeding gums and tooth loss. He is extremely concerned because once he
reaches home, he doesn't have those symptoms. Assume you are a
medical doctor and tell what vitamin is missing from the voyage diets.

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

Which of the following is not a potential result of deforestation?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?