Which of the following are key elements of Darwin’s theory of evolution by natural selection? Highlight all correct answers. A. genetic variation
B. genetic engineering
C. fitness
D. adaptation
E. independent assortment

What would be the most likely result if the ph of the stomach were increased to 5

All organisms contribute some water to the water cycle by conducting

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.