Which of the following types of nonrenewable fuel sources requires the storage of radioactive waste?

a. coal
b. oil
c. solar
d. nuclear

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

What is the next step in the process after a substrate enters the active site of an enzyme

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.