12. describe three relationships between biotic or abiotic
factors in an ecosystem. how is energy transferred in each
relationship?
ex: the wild hog eats grass so it can use the grass energy
to move and grow.

Which of the following is most important in making the typical seed more resistant to adverse conditions than the typical spore? a) a different type of sporopollenin b) an internal reservoir of liquid water c) integument(s) d) ability to be dispersed e) waxy cuticle

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

Long term exposure to waves can cause sunburns and skin cancer.