Cell-signaling molecules are generally which type of macromolecule?
A. protein
B. nucleic acid
C. carbohydrate
D. polysaccharide
E. lipid
A
Biology & Microbiology
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Natural selection is limited in its effectiveness in preserving new favorable mutations in an environment that
Biology & Microbiology
An atom with an electrical charge is a(n) ________
A) isotope B) molecule C) ion D) compound
Biology & Microbiology
A population in biology refers to a group of organisms that
A. are different species. B. are genetically related. C. are the same species. D. live in the same space. E. cannot interbreed.
Biology & Microbiology
The Nod factor is an important component of
A. the formation of the digestive enzymes of carnivorous plants. B. legume-bacterial interactions. C. mycorrhizal-terrestrial plant interactions. D. the Calvin Cycle. E. trichloroethylene metabolism.
Biology & Microbiology