Centromeres are
A. composed of microtubules.
B. two identical sides of a metaphase chromosome.
C. regions that attach chromosomes.
D. the structures that contain genetic material.
C. regions that attach chromosomes.
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Blood in arteries
1.always travels away from the heart. 2.travels away from the heart only if it is oxygen-rich. 3.always travels toward the heart. 4.travels from the lungs. 5.is always oxygen-rich.
How would the speed at which the electrochemical impulse travels down the axon be affected by decreased myelination of an axon?
A) It would decrease. B) It would increase. C) It would maximize. D) It would have no effect.
Haemophilus influenzae requires hemin (X factor) to synthesize cytochromes and NAD+ (V factor) from other cells
For what does it use these two growth factors? What diseases does H. influenzae cause?
Optimal color vision occurs in the fovea, a depression in the retina where most of the ________ are located
Fill in the blank(s) with correct word