In this type of immunity, the response is
immediate, the antigen is detected by a fixed
set of receptors, and does not persist. This type
of immunity is
a. innate.
b. adaptive.
c. antibody-mediated
d. cell-mediated.
e. more than one of these
E
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In general, termination of transcription
a. occurs at a specific site that is stable to changes in temperature. b. requires transcription of the sequences signaling termination. c. is unaffected by sequences that are not in proximity to the termination site. d. is triggered by RNA polymerase's interaction with DNA sequences. e. requires accessory proteins.
Which of the following statements about monocots is true?
a. They lack sclerenchyma tissue. b. They have a well-developed vascular cambium. c. They do not produce bark. d. Their lateral meristems give rise to wood. e. Secondary growth occurs rather slowly
Which person might have the greatest influence on reducing greenhouse gas emissions in industrial, commercial, and agricultural sectors?
In the Hardy-Weinberg equation, 2pq refers to
A) the proportion of heterozygotes in a population. B) the number of homozygous dominant individuals in a population. C) the most common phenotype in a population. D) individuals who are homozygous recessive.