Which of the following statements is true of viruses?
a. They are a type of bacteria that is able to
live longer.
b. They are the largest of all infective
organisms.
c. They cannot live outside of a cell; they must
enter a living cell to survive.
d. They are easily killed or controlled with
antibiotics.
c. They cannot live outside of a cell; they must
enter a living cell to survive.
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The ____ is/are responsible for closing off the airway during swallowing
a. larynx b. epiglottis c. pharynx d. intercostal muscles e. pleura
TNF is ____ for neutrophils
Fill in the blank(s) with the appropriate word(s).
The greatest incidence of skin cancer (melanoma) would be expected to occur in
A) people who are deficient in vitamin D and live near the poles. B) people who are deficient in folate and live near the poles. C) people who are deficient in vitamin D and live near the equator. D) people who are deficient in folate and live near the equator.
One day after a biology class four of your friends argue about the difference between phylogeny and systematics. Which friend is right?
A. Friend A states that systematics and phylogenies are really the same, one is more recent than the other, but basically they are the same. B. Friend B says that systematics is the same as cladistics and cladistics is reconstructing clades, which ultimately lead to the development of phylogenies. C. Friend C argues that systematics is the actual collecting and cataloguing of specimens into museums that can be used later by scientists to construct clades and phylogenies. D. Friend D says that the way she remembers is that systematics is the reconstruction and study of phylogenies.