The wavelength of light used plus the numerical aperture governs
A. size of the field.
B. magnification.
C. resolution.
D. illumination.
E. All of these choices are correct.
Answer: C
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MAPK and MEK are intracellular signaling proteins that mediate cell division induced by growth factors. When mutations in the normal MAPK and MEK genes result in an abnormally high level of MAPK and MEK activity and an increased rate of cell division, then the mutated gene is called a(n)
A. spliceosome. B. transposon. C. tumor-suppressor gene. D. oncogene. E. None of the choices are correct.
Which of the following zones has the highest productivity and biodiversity in the ocean?
a. neritic zone b. abyssal zone c. aphotic zone d. photic zone
A chromosome inherited from the male parent is called the
1.sex chromosome. 2.homologous chromosome. 3.sister chromatid. 4.paternal chromosome. 5.maternal chromosome.
Organisms that are radially symmetrical have ________ embryonic germ layers
A) two B) three C) four D) five E) six