Which of the following best predicts the response of a trait to artificial selection?
A) VA
B) VG
C) H2
D) h2
E) standard deviation
D
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Of the following, which is the most current description of a gene?
A) a unit of heredity that causes formation of a phenotypic characteristic B) a DNA subunit that codes for a single complete protein C) a DNA sequence that is expressed to form a functional product: either RNA or polypeptide D) a DNAâ€"RNA sequence combination that results in an enzymatic product E) a discrete unit of hereditary information that consists of a sequence of amino acids
Tamoxifen blocks the activity of estrogen in ____, but increases the activity of estrogen in ____
a. breast tissue; ovarian tissue b. uterine tissue; ovarian tissue c. uterine, tissue; breast tissue d. breast tissue; uterine tissue e. brain tissue; breast tissue
The role of a sphincter is to
a. control the passage of materials. b. create a churning motion. c. propagate peristalsis. d. absorb excess water from feces. e. do more than one of these
The process in which an atom or molecule loses one or more electrons to another atom or molecule is
called a. reduction. b. dehydration. c. oxidation. d. condensation. e. hydrolysis.