In reef-building corals, a symbiotic relationship exists between corals and a type of algae that live in their tissues. The corals gain energy and oxygen from this association, while the algae obtain carbon dioxide, nitrogen, and a stable habitat. This type of relationship is best categorized as

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.

What is the term for a water wave that is created by an underwater earthquake?