Which of these statements is true regarding portals of exit?
A) The portal of exit for tuberculosis is the skin.
B) In most cases, a microbe uses the same portal for both entry and exit.
C) The urinary tract is the most common portal of exit.
D) Polio viruses most often use the respiratory portal of exit.
Ans: B) In most cases, a microbe uses the same portal for both entry and exit.
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Given the B cell's role in the adaptive immune response, it is reasonable to assume that a B cell will have:
A. a large number of pseudopods. B. extensive rough endoplasmic reticulum. C. an enlarged nucleus. D. All of the answer options are correct.
Which of the following is mostly performed by bacteria living within the roots of plants in the legume family?
a. nitrification b. ammonification c. nitrogen cycling d. nitrogen fixation e. nitrogen assimilation
Structures that evolved from the same structure in a common ancestor are
A) homologous. B) analogous. C) convergent.
Edward Jenner was the physician who first used cowpox to vaccinate individuals against smallpox.
Answer the following statement true (T) or false (F)