A flower with petals, sepals, stamens, and one carpel is ____
a. perfect and incomplete
b. imperfect and complete
c. imperfect and incomplete
d. perfect and complete
e. sterile
ANSWER: d
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What term describes the failure of one species' sperm to fertilize the egg of a different species?
A. Mechanical incompatibility B. Behavioral isolation C. Hybrid weakness D. Gametic incompatibility
In karyotyping, individual chromosomes may be distinguished from others by
a. a comparison of chromosome lengths. b. bands produced on chromosomes by differential staining. c. the position of centromeres. d. the relative lengths of the "arms." e. all of these.
With which of the following would hemizygosity most likely be associated?
A) incomplete dominance B) X-linked inheritance C) sex-limited inheritance D) autosomal dominance E) codominance
Diffusion during which the substance to be transported binds selectively to a membrane-spanning protein, which helps the process along, is called ________.
a) simple diffusion b) active transport c) facilitated diffusion d)facilitated osmosis e) osmosis