The large intestines of pigs are the primary reservoir of the pathogen that causes
A. cryptosporidiosis and cyclosporiasis.
B. balantidiasis.
C. trypanosomiasis leishmaniasis.
D. amebic meningoencephalitis.
E. amebiasis and trichomoniasis.
Answer: B
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Which of the following statements is not true of the two alternative hypotheses for how the force is generated to pull water up the xylem?
A. The pectin gel in which cellulose microfibrils are embedded in the cell wall causes water to flow into a partially dehydrated cell wall by osmosis. B. Water is drawn by capillary action into the spaces between cellulose microfibrils in partially dehydrated cell walls. C. Evaporation out of the stomata causes the cell walls of those cells lining the intercellular air spaces to become partially dehydrated. D. The pectin gel in which cellulose microfibrils are embedded in the cell wall is slightly positive in charge, restricting the diffusion of positively charged ions. E. Water loss to the air causes a decrease in water vapor in the air spaces in the leaf.
Of the following statements, which does not correlate a type of RNA with its function?
A. Ribosomal RNA is part of the ribosome. B. Transfer RNA functions to carry amino acids to the ribosome. C. Ribosomal RNA functions as a catalyst to bind amino acids into proteins. D. Messenger RNA carries the code used to make a protein. E. Complementary RNA reorders the amino acids to insure their correct sequence.
What does the term "tetrapod" mean?
A) egg-laying B) living on land C) living a double life D) having four feet
Match the following items with the correct phrases.
_______1. A monomer; the most common type of immunoglobulin; very high levels are produced in the secondary (anamnestic) response to an antigen. _______2. A pentamer; five monomers linked together by a J-chain; the first type of immunoglobulin to be formed in the primary response to an antigen. _______3. A monomer; present on the surface of mast cells and basophils. _______4. A dimer; two monomers linked together by a J-chain; frequently found in mucous membranes. _______5. Produced by atopic individuals in response to allergens. a. IgA b. IgD c. IgE d. IgG e. IgM