Which of the following statements is incorrect regarding Listeria monocytogenes?
A. It is resistant to heat.
B. It is fastidious.
C. It does not produce a capsule.
D. It is resistant to cold.
E. It is resistant to salt.
Answer: B
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The evolution of petals through the AP3 gene is best explained by
A. a new gene mutation. B. the modification of an existing gene for a new function. C. homoplastic convergence. D. gene duplication and divergence. E. conserved genes.
Which type of cytoskeletal fiber is important in the function of nuclear lamina?
A. microfilaments B. intermediate filaments C. microtubules D. fibronectin
Why is bird flu (H5N1) considered an emerging disease whereas HIV is not?
A. Bird flu (H5N1) is bacterial whereas HIV is viral. B. Bird flu (H5N1) has only been recognized in the past 20 years. C. Bird flu (H5N1) has not infected as many people as HIV. D. Bird flu (H5N1) has infected more people than HIV. E. Bird flu (H5N1) is more deadly than HIV.
Which of these crosses will produce only heterozygous offspring?
A) AA × aa B) AA × Aa C) Aa × Aa D) Aa × aa