Which of the following is a type of epithelial
tissue that is one layer thick?
a. stratified
b. dense connective
c. loose connective
d. simple
e. more than one of these
D
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Auxins primarily flow downward in shoots and roots and this transport is called:
A. bipolar B. polar C. nonpolar D. tripolar E. dipolar
The first land plants were bryophytes, which then branched into ferns, gymnosperms, and finally angiosperms. What advantage did angiosperms have over gymnosperms?
a. Angiosperms can produce flowers and fruits to aid in seed dispersal b. Angiosperms produce pollen and do not require water to reproduce c. Angiosperms go through alternation of generations d. Angiosperms have a vascular system, this allowed them to grow taller e. The angiosperms can produce spores which are more stable than seeds from gymnosperms
Changes in the human species since the time of the first humans is an example of
A. evolution. B. hydrolysis. C. life. D. metabolism.
Pleiotropic genes ____.
A. act on secondary sexual characteristics B. influence more than one aspect of phenotype C. are additive D. Always produce lethal effects when homozygous E. can only affect one trait or characteristic at a time