What is a function of antioxidants?
A) to prevent muscle cramps and weakness
B) to improve skin tone and fight acne
C) to decrease damage done to cells by free radicals
D) to allow the cell to maintain water balance
C
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Prokaryotic cell movement is attributed to:
A. pili. B. ribosomes. C. flagella. D. cytoskeleton proteins. E. capsules.
The underlying factor that allows an organism to become a separate species is _____.
a. ability to produce a hybrid b. polyploidy c. sufficiently large genetic differences d. isolation e. genetic divergence
Overexpression of caudal in the early Drosophila embryo, at a level high enough to overcome inhibition by Bicoid protein, would
A. interfere with the development of both anterior and posterior structures. B. interfere with the development of anterior structures. C. have no effect since the cytoplasm has already been determined. D. interfere with the development of posterior structures.
A student sees a bee on a flower. the student wonders how the bee finds flowers. this student is displaying the scientific attitude of
a. creativity. b. curiosity. c. open-mindedness. d. skepticism