Why are mushrooms important to the food chain?

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

Science which of the following is an example of a cyclic behavior that is seasonal? i think the answer is d, i just need to double check : ). a. running from predators. b. searching for water. c. hunting at night. d. migrating for warmth. ***