Why is DNA called the universal genetic code? O All DNA is contained in the nucleus of a cell.
O DNA has been found on every planet in our universe.
O All DNA is made of the same building blocks called nucleotides.
DNA is found in animal and plant cells but not in bacteria.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

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.

20 how are energy cycles and growth cycles related?