DNA-containing viruses are easier to fight and treat than RNA viruses because:
a. antibiotics work only on DNA viruses, not on RNA viruses.
b. RNA viruses have relatively stable genomes and so cannot be inactivated by mutagenic drugs.
c. DNA viruses do not change rapidly.
Ans: c. DNA viruses do not change rapidly.
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The water lost during transpiration is a side effect of the plant's exchange of gases. However, the plant derives some benefit from this water loss in the form of _____
A) increased turgor and increased growth B) mineral transport and increased growth C) evaporative cooling and increased turgor D) evaporative cooling and mineral transport
Some energy gets stored in molecules that most consumers cannot break down. For example, most carnivores cannot access energy tied up in bones, scales, hair, feathers, or fur. What effect does this have?
a. More energy is lost through heat by the energy needed for digestion. b. Energy transfer between trophic levels is efficient. c. It increases the need for many trophic levels. d. Only a small percent of the energy in an organism ends up in tissues of an organism at the next trophic level. e. Second-level consumers do not require as much energy.
When is a cell committed to undergoing mitosis?
a. once it transitions from S to G2 b. once it transitions from G1 to S c. once it transitions from G1 to G0 d. once it transitions from G2 to prophase
According to the results of the StaphTEX agglutination assay, which unknown culture was Staphylococcus aureus?
A) Unknown B B) Unknown A C) Neither D) Both