Which of the following is a unique feature of viruses that separates them from bacteria?
A. They are generally smaller.
B. They are often highly toxic.
C. They lack proteins.
D. They have different nucleotides in their hereditary material.
E. They cannot exist outside of a host cell.
A. They are generally smaller.
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Imagine two species of birds with similar beak sizes and diets. Where the two species are allopatric, we would expect that their beak sizes
A. should be more different than when sympatric. B. should be more similar than when sympatric. C. should be larger than when sympatric. D. should be smaller than when sympatric. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about character displacement? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
What is the primary method by which zebra mussels have traveled beyond the Great Lakes?
a. attached to animals b. attached to boats c. attached to plants d. via water currents
Duplication of DNA occurs
A. during interphase. B. before meiosis II only. C. during prophase I. D. twice, before meiosis I and meiosis II.
A typical sponge is best described as a
A) slow-moving suspension feeder with a true coelom. B) sessile suspension feeder with bilateral symmetry. C) slow-moving carnivore with no true tissues or symmetry. D) sessile suspension feeder with no true tissues or body symmetry.