An alternative form of a single gene is known as
A) a parental.
B) a dihybrid.
C) a reciprocal.
D) an allele.
E) a recessive.
D) an allele.
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Fish can exhibit behaviors that are directed to
(a) members of the same species. (b) members of different species. (c) nonliving constituents of the environment. (d) all of these choices.
Where does the step of the ornithine cycle in which urea is produced occur?
a. mitochondria b. nucleus c. cytosol d. vacuoles
What guides the production of a multi-celled
organism?
a. the sequence of nucleotide bases in DNA b. the sequence of amino acids in a protein c. the sequence of fatty acids in a triglyceride d. the sequence of nucleotides in RNA e. the sequence of monosaccharides in a polysaccharide
Molecules can be described as polar when _____.
A) they are long and thin B) the molecules have a distinct top and bottom C) the electrons in one or more covalent bonds are shared unequally D) they readily dissolve in oil or turpentine