Some populations display continuous variation, which arises when _____.
A) epistatic interactions occur between the products of two or more genes
B) environmental factors, such as temperature, vary seasonally
C) multiple genes influence the inheritance of the same trait
D) crossing over occurs during gamete formation
Answer: C) multiple genes influence the inheritance of the same trait
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The best estimate for the number of people suffering from diabetes mellitus in the U.S. is ________.
A. 29,000 B. 290,000 C. 2,900,000 D. 29,000,000
Exocrine glands:a
have products that are transported via the circulatory system. b. lack ducts. c. include goblet cells and milk glands. d. release hormones. e. lack epithelial tissue
What explains the coloration of giant kelp?
A. It is the result of waste products stored in the tissues. B. It warns grazers of their toxic properties. C. It facilitates absorption of the blue-green light prevalent in their environment. D. It facilitates absorption of the brown light prevalent in their environment. E. It camouflages them from grazers.
Most populations grow exponentially
a. true b. false