Rods provide color vision while cones are better suited to night vision (black and white).
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Process by which substances (lead, mercury, PCB, DDT) become…
Process by which substances (lead, mercury, PCB, DDT) become more concentrated in the higher trophic levels of a food web.
Red bone marrow serves to store fat.
Red bone marrow serves to store fat.
Earthworms are in the phylum ____.
Earthworms are in the phylum ____.
An underground horizontal stem.
An underground horizontal stem.
Most bacteria are producers.
Most bacteria are producers.
In the following diagram, what is represented by “B”?
In the following diagram, what is represented by “B”?
Approximately what percentage of energy in one trophic level…
Approximately what percentage of energy in one trophic level is incorporated into the next level?
Which of the following structures attaches muscle to bone?
Which of the following structures attaches muscle to bone?
The organs that produce the gametes are the gonads.
The organs that produce the gametes are the gonads.