Which subatomic particles of a pigment absorb light?
a. electrons only
b. protons only
c. neutrons only
d. electrons and protons
e. protons and neutrons
a
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After leaving our left ventricle, blood next passes through the
A. vena cava. B. aorta. C. semilunar valve. D. atrioventricular valve. E. left atrium.
________ reproduction, in contrast, generates genetically unique offspring. To accomplish this, an organism must produce _____, sperm and egg, through the process of _______. The cells produced this way will be _______, meaning that they contain a single set of chromosomes. Such cells are produced only in the ______.
Fill in the blank(s) with the appropriate word(s).
Olfactory centers are responsive to
a. touch. b. smell. c. taste. d. sound. e. sight.
Which of the following is used to define a phenotypic characteristic resulting from the expression of two or more genes?
A. linked genes B. incomplete dominance C. pleiotropy D. polygenic inheritance