Bogs have low net primary productivity because of the low levels of which resources?
a. oxygen and carbon
b. nitrogen and phosphorus
c. nitrogen and oxygen
d. phosphorus and oxygen
c. nitrogen and oxygen
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Which of the following most adequately describes how the Alu element may have proliferated to constitute 10% of the human genome?
A. Multiple retroelements code the same gene. B. Retroelements increase with every generation. C. A single retroelement can be copied into many RNA transcripts. D. Retroelements increase with each cell division. E. Retroelements show self-proliferation.
In Pavlov's dog experiment, what were the original and conditioned stimuli?
A. original stimulus: food, conditioned stimulus: metronome B. original stimulus: saliva, conditioned stimulus: food C. original stimulus: metronome, conditioned stimulus: experimenter D. original stimulus: experimenter, conditioned stimulus: saliva E. original stimulus: metronome, conditioned stimulus: saliva
CO2 and H2O are converted to HCO3
? and H+ in the blood of the lungs.
Indicate whether the statement is true or false.The various flower parts are attached to a modified branch called the:
a. style b. receptacle c. stigma d. filament e. sepal