Bacterial and archaeal ribosomes are known as ________ ribosomes, based on their sedimentation coefficient.
A. 70S
B. 80S
C. 50S
D. 30S
Answer: A
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Which of the following characterize the Calvin cycle?
A. Produces oxygen B. Produces glucose as an end product C. Produces carbon dioxide and water D. A process that requires light E. Nitrogen is fixed into an organic form
In nitrification, electrons are donated to an electron transport chain from ammonia or from nitrite to be oxidized to ________, with ________ serving as the terminal electron acceptor.
Fill in the blank(s) with the appropriate word(s).
A protobiont
A. has a boundary, or membrane. B. contains polymers inside that store information. C. has a boundary and contains polymers inside that store information. D. polymers that have enzymatic functions. E. has a boundary, contains polymers that store information and other polymers that act as enzymes, and it can replicate itself.
A construction company has cleared all the trees from an area near a river in order to build luxury homes with unobstructed views of the river. What do you predict will be the effects of this action? Check all that apply.
_____ An increase in the volume of water running off into the river. _____ A decrease in the amount of nutrients leached from the soil. _____ An increase in the concentration of nutrients in the run off entering the river. _____ A build up of inorganic nutrients in the soil of the deforested area. _____ Increased weathering of rocks in the deforested area.