Specimen collection
A. does not require special handling.
B. must be done under sterile conditions.
C. is always done by a medical professional.
D. must utilize aseptic techniques.
Answer: D
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The ______________ is a digestive cavity in which food enters an opening at one end and passes through the animal in one direction as it is digested.
A. gastrovascular cavity B. stomach C. alimentary canal D. epithelial cavity E. intestine
The beneficial feature of economic development is that it is even across space
Indicate whether this statement is true or false.
The methanogens, producers of methane gas, require environments that
A. are directly exposed to sunlight. B. have abundant oxygen and CO2. C. are extremely cold. D. are very acidic. E. are anaerobic with hydrogen gas and CO2.
What is the most likely consequence of a mutation that causes sporopollenin to degrade quickly after it is synthesized?
A. a decrease in the number of sperm that can be produced B. a reduction in the ability of pollinators to detect and transfer pollen grains to a stigma C. a decrease in the ability of the pollen grain or spore to open when a suitable location is found D. a reduction in the ability of the integument of an ovule to develop into a seed coat E. a reduction in the ability of pollen and spores to disperse to new areas