Scientists often use fruit flies as a method to test hypotheses about human genes. which of the following best explains that fruit flies are advantageous in the study of human inheritance?
a. they can self-pollinate.
b. they lack nucleic acids.
c. they are very different from humans.
d. they reproduce quickly and take up little space.

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.