Dyes are usually added to sections of biological specimens to increase
a. resolving power.
b. magnification.
c. contrast.
d. all of the above.
d
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The wavelength of visible light with the highest energy is:
a. violet b. blue c. yellow d. orange e. red
You do not really want to get your 3 children vaccinated. Your view is why do it when others around you will get the vaccine and end up protecting you and your children. Which is an accurate statement that your physician may provide to you in response to your challenge to vaccination?
A. Your choice is fine; maybe you will change your mind when your child goes to college. B. This is not a smart choice. You could face potential arrest for not vaccinating your child per the regulations of the U.S. government. C. This is not a smart choice. If enough people choose not to get vaccinated, the susceptible population grows to a large size, breaking the protective effect of herd immunity. D. Your choice is fine; your children will never become infected since this is actually the basis of herd immunity.
Which of the following statements about retinoblastoma offers support for the idea that multiple
mutations are needed in cancer? A. Noninherited cases involve both eyes and occur later in life. B. Noninherited cases involve both eyes and occur early in life. C. Inherited cases involve one eye and occur early in life. D. Inherited cases involve one eye and occur late in life. E. Noninherited cases involve one eye and occur later in life.
Which of the following features is common among the roundworms as well as the arthropods?
A. Segmentation is readily apparent. B. Periodically shed their outer covering. C. Radial symmetry. D. Undergo metamorphosis. E. Endoskeleton.