Which of these pairs is correctly matched?
A) IgE: typically structured as a pentamer
B) IgG: first immunoglobulin produced in a primary immune response
C) IgM: readily crosses the placenta to protect the fetus/newborn
D) IgA: found in secretions such as colostrum, tears, and mucus
Ans: D) IgA: found in secretions such as colostrum, tears, and mucus
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During Mendel's time, a widely accepted theory called ____ suggested that evolution occurred in spurts rather than by
gradual change.
a. catastrophism b. uniformitarianism c. mutationism d. natural selection e. genetic transformation
If wire hair (W) is dominant to smooth hair (w), and you find a wire-haired puppy, how would you determine its
genotype by a genetic breeding experiment? What will be an ideal response?
Substance B is synthesized in neurons, travels through gap junctions, and triggers the transduction of an
electrochemical signal. This is an example of ____.
a. autocrine signaling b. paracrine signaling c. long-distance signaling d. local signaling e. communication by direct contact
Mutations in ____________________ cells will be passed on by cell division, but cannot be transmitted to future
generations. Fill in the blank(s) with the appropriate word(s).