Some researchers believe there is no such thing as true altruistic behavior because they believe that a. is unrelated to biological concerns b. is motivated by self-interest c. influences cognitive functioning d. is too uncommon to be observed

Which action is an appropiate immediate response to a flood? a. removing wet clothing b. marking flooodwater levels c. avoding crossing flowing water d. walking, no driving, through water

So i have a lot of answers answered but it says i still need to answer more questions. why is it doing that? how many questions need to be answered?

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.