Which of the following is not true about matter in ecosystems ? a. matter is recycled over and over in ecosystems. b. biogeochemical cycles transform and reuse nutrients in ecosystems. c. matter in an ecosystem flow in one direction and is never reused.

Marianne is comparing two animals: a fruit fly and a fruit bat. she asks, "do a fruit fly and a fruit bat share a common ancestor in their evolutionary history? " according to evolutionary theory, what is the answer to marianne's question?

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

During binary fission, what events must occur before the cell splits into two new cells?