If one group is given some medicine that may cure a disease and the other group is given a sugar pill, the group who got the medicine is the
A. Hypothetical group.
B. Scientific group.
C. Control group.
D. Experimental group.
D. Experimental group.
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What percentage of terrestrial plants are colonized by arbuscular mycorrhizae?
A) 10 B) 25 C) 50 D) 85
What often describes organisms with a Type III life history?
A. K-selected B. r-selected C. idiopathic D. at their carrying capacity E. subject to low predation rates
During the early stages of starvation, the amount of fat in the body will steadily decrease, but the amount of protein will drop only slightly. This is known as
A. protein-sparing. B. wasting disease. C. lip-sparing. D. bulimia.
There are currently many similar-looking but different species on either side of the Isthmus of Panama. They most likely resulted from
A) allopatric speciation. B) random mutations. C) hybridization. D) sympatric speciation. E) temporal isolation.