We would expect the greatest difference in plant health between two groups of plants of the same species, one group with mycorrhizae and one group without mycorrhizae, in an environment _____
A) where nitrogen-fixing bacteria are abundant
B) that has soil with poor drainage
C) in which the soil is relatively deficient in mineral nutrients
D) that is near a body of water, such as a pond or river
C
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It is common for negative estuaries to be:
a. lower in salinity than the ocean. b. nutrient poor. c. nutrient rich. d. lower in temperature than the ocean. e. brackish.
The sense of hearing in vertebrates is dependent on al of the following EXCEPT
a. fluid displacement. b. hair bending. c. bone movement. d. membrane vibration. e. chemical reception.
One of the most common causes of mental retardation in the United States is
a. congenital rubella syndrome. b. cocaine addiction. c. fetal alcohol syndrome. d. use of thalidomide by pregnant women. e. use of tetracycline by pregnant women.
Transposable elements make up ________ of the human genome.
Fill in the blank(s) with the appropriate word(s).