During a one-year study, researchers found no difference in treehopper populations in any of their control and experimental groups
What could they measure during the second year to gain information about why this might have occurred?
A) Measure the number of ant females.
B) Measure the relative sizes of the treehoppers.
C) Measure the relative abundance of jumping spiders.
D) Measure the relative sizes of different ant species.
Answer: C
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How might a species' range be extended?
A) through increased migration rates B) through increased immigration rates C) through climate change D) through decreased reproductive rates
Which of the following is the substance referred to as endotoxin
a. Hemolysis b. coagulase c. lipolysaccharide d. collagenase e. streptolysin f. staphylokinase
The organization of muscle tissue from a macroscopic level to a microscopic one is as follows:a
muscle fibers ? myofibrils ? myofilaments. b. muscle fibers ? myofilaments ? myofibrils. c. myofibrils ? muscle fibers ? myofilaments. d. myofilaments ? myofibrils ? muscle fibers. e. muscle fibers ? myofibrils ? myofilaments.
Which of the following is a function of the digestive system?
A. make hemoglobin B. transmit hormonal messengers throughout the body C. search out and destroy foreign substances, including viruses and bacteria D. absorb nutrients E. eliminate nitrogenous waste