How does the release of histamine by mast cells help the innate immune response?

A. It signals neutrophils to migrate to the site
of infection.
B. It makes it easier for neutrophils to move
from the bloodstream to the site of infection.
C. It increases the volume of blood flow in the
area of the infection.
D. Two answer options are correct: It makes
it easier for neutrophils to move from the
bloodstream to the site of infection AND
increases the volume of blood flow in the
area of the infection.


D

Biology & Microbiology

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None of the nocardioform actinomycetes are pathogenic to humans.

Answer the following statement true (T) or false (F)

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Parapatric speciation occurs most often

a. within in the same home range. b. when a population extends across different habitats within the same home range. c. within a group of interbreeding populations. d. on either side of geographic barriers. e. by polyploidy.

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Aspergillus sydowii spores land in the Caribbean Sea

and infect__________. a. salmon. b. red snapper. c. sea urchins. d. sea fans. e. all of these.

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Genes A and B are located 10cM from each other on a chromosome. Gene C is located 25cM from gene A and 15cM from gene B. Assuming that I = 0, what is the probability that the trihybrid ABC/abc will produce an ABC gamete?

A) 76.5% B) 38.25% C) 25% D) 1.5% E) .75%

Biology & Microbiology