Which organ of the gastrointestinal tract has a large commensal population of microorganisms?
A. Large intestine
B. Small intestine
C. Pancreas
D. Liver
E. Salivary glands
Answer: A
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The optimal pH range for most freshwater fishes and invertebrates is
A. 2 - 6 B. 2 - 4 C. 4 - 6 D. 6 - 9 E. 8 - 11
The relationship of disease-causing organisms to an infected rabbit is one of
A. parasitism. B. commensalism. C. competition. D. herbivory. E. interference competition.
What did Mendel observe when he crossed two true breeding plants with contrasting traits?
What will be an ideal response?
Answer the following questions true (T) or false (F)
1. Recent evidence has shown chlorofluorocarbons have no effect on ozone. 2. Scientists predict climate change related to CO2 will increase temperatures over the next century but will have no effect on sea level or precipitation patterns. 3. Warm air can hold more moisture than cold air.