Which of the diagrams below best depicts the flow of carbon between primary producers, consumers, and decomposers?
A. primary producers consumers
decomposers
B. consumers primary producers
decomposers
C. decomposers consumers primary
producers
A
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In a typical nerve cell, the nucleus is found in the _____
A) cell body B) synaptic terminals C) axonal region D) dendritic region E) synapse
Otto Loewi performed an experiment in which he first electrically stimulated the vagus nerve connected to a frog heart. He then passed the fluid bathing this heart to a second chamber containing a second frog heart not connected to a nerve. What did Loewi observe?
A. There was no effect on the beating of either heart. B. The first heart showed an increase in beat rate, but there was no change in the second heart. C. The first heart showed an increase in beat rate and so did the second heart. D. The first heart showed a decrease in beat rate, but there was no change in the second heart. E. The first heart showed a decrease in beat rate and so did the second heart.
The F factor can be integrated into the bacterial chromosome through ____
a. mitosis b. DNA replication c. transcription d. crossover events e. transduction
Plants use what form of nitrogen to make the building blocks for proteins and nucleic acids?
a. nitrogen gas b. nucleic acids c. ammonium d. urea e. nitrous oxide