Which statement is correct with respect to gross primary productivity?
A.
It is the total amount of energy produced by plants.
B.
It is the amount of energy used by plants for respiration.
C.
It is the amount of carbon dioxide that the plants release.

Explain how scientists use geologic time to determine the age of landforms.

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.

Analyze how the water cycle affects a food web. now list 3 examples for each below using complete sentences, on how too much water would affect the same web? how about to little water?