★ Eye and Ear Quiz
Which of the following structures are the sensory receptor cells that see color?
A. CONES
B. LENS
C. RODS
D. OPTIC DISK
Select your answer:
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Ecology › ViewWhich of these is an example of natural selection?
A. The largest animal in a population will have more opportunities for reproduction.
B. Several species of organisms work together so that they all succeed.
C. One species takes all the resources in an environment leaving none for others.
D. Organism that are best suited to an environment tend to survive and reproduce more often.
Blood and Bones › View
The lack of sufficient red blood cells in the blood system is called
A. cyanosis
B. anemia
C. hemochromatosis
D. hypoxia