Cell deteriorations due to viral infections are known as
a) transformations.
b) biosynthesis.
c) cytopathic effects.
d) plaques.
Ans: c) cytopathic effects.
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Which of the following statements is true of the bryophyte gametophyte generation?
A. It is diploid. B. It produces spores. C. It is unicellular. D. It is dominant. E. It is dependent on the sporophyte.
Imagine that a lizard inhabits a desert where it has very few natural predators. During a year where resources are scarce, the lizard produces a handful of large eggs rather than several small eggs. This is an example of a(n) ____
Fill in the blank with the appropriate word.
In the late 1920s, a mutation occurred in many silver fox farms around the world. The fox farms that
sold expensive furs were proud of the quality of their furs, and each advertised that it had the best and most pure breed of all the fox farms. The new mutations produced a "platinum" coat pattern that was commercially desirable, so the farms crossed them to get more. The results of their breeding experiments were as follows: (1) silver ? silver ? all silver offspring; (2) silver ? platinum ? equal numbers of silver and platinum; (3) platinum ? platinum ? 2 platinum for each silver offspring. Explain. What will be an ideal response?
Which of the following contributes to the pathogenesis of Cryptococcus neoformans?
A. the ability to produce hyphae which penetrate tissues B. the production of leukocidins C. the production of mucinase D. the ability to resist killing after phagocytosis E. the production of melanin and the presence of a phagocyte-resistant capsule