Predators often avoid a mimic species because of ____.
A. bad taste
B. toxic secretion
C. resemblance to a well-defended species
D. painful sting
E. cryptic coloration
Answer: C
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Which condition is NOT associated with chromosome 21?
a. sickle-cell anemia b. Down syndrome c. ALS d. epilepsy e. schizophrenia
Which of the following statements concerning mycorrhizae is FALSE?
a. They are symbiotic associations between a fungus and a plant root. b. They increase the uptake of nutrient minerals by the plant. c. Arbuscular mycorrhizae are extracellular. d. Endomycorrhizae are intracellular. e. Members of the Glomeromycota may be involved.
Drones are male honeybees that
A) build the hexagonal cells of wax for the larvae. B) mate with the queens. C) forage for food. D) feed the developing larvae.
Bangladesh has 2,596 persons per square mile, while the United States has 780 persons per square mile and Canada has 9 persons per square mile. These statistics compare the ________ of these countries.
A. limiting factors B. population densities C. population distributions D. carrying capacities E. rate of natural increase