Gause's principle of competitive exclusion is based on the idea that ____.
A. larger organisms exclude smaller ones through competition as in the case of large trees controlling underbrush
B. competition for the same resources excludes species having different life styles
C. no two species can occupy the same niche indefinitely when resources are limited
D. two species can coexist if their niches do not overlap
E. species survival depends upon coevolution
Answer: C
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The ________ pathway uses a set of proteins that bind to ends of two broken DNA fragments and join them together.
Fill in the blank(s) with the appropriate word(s).
Cancer can be considered an inherited disease if ____________________
a. at least one mutation is inherited b. a family member has some type of cancer c. all members of the family share the same gene d. a person inherits a tumor suppressor gene from one of his parents
What two atoms are found in all organic
compounds?
a. carbon and hydrogen b. carbon and oxygen c. oxygen and hydrogen d. carbon and phosphorous e. oxygen and sulfur
Height, weight, and eye color are examples of phenotypes that illustrate
a. codominance. b. continuous variation. c. pleiotropy. d. incomplete dominance. e. multiple allele systems.