Your friend is scuba diving in Iceland at a mid-oceanic ridge and picks up a rock. He wants to know how old the rock is compared to the rock in Maryland. Explain to your friend which rock is the oldest and how you came to this conclusion. Use evidence from your notes.

A rock is older in Maryland because the mid-Atlantic ridge goes through Iceland, leaving newer rocks there.

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."