Examine the diagram below. The pieces labeled A and T are nitrogenous bases known as adenine and thymine. What kind of macromolecule is this?
A) Nucleic acid. B)protein. C) lipid D) fatty acid

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Why is a dominant allele called dominant

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

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.