The following amino acid would be characterized as ____ based on the chemical properties of its side chain
a. basic
b. acidic
c. nonpolar
d. hydrophilic
e. electrically charged
c
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The bottleneck effect is the loss of genetic diversity that occurs when
A. many organisms have successful survival rates. B. many members of a population die. C. large groups of individuals leave their home population and establish new settlements. D. small groups of individuals leave their home population and establish new settlements. E. many members of a population reproduce.
Which alternate hypothesis might also explain industrial melanism?
A. Pollution kills important tree species that peppered moths depend on for egg laying. B. Dark moths emigrate out of polluted areas to escape the pollution. C. Dark moths are more resistant to the toxic effects of pollution than light moths. D. Birds used the marks that Kettlewell placed on the moths when he released them to help them find and capture the moths. E. Because dark moths absorb more heat, they are more active and better able to avoid bird predation.
Which of the following is NOT accurate about the shoot apical meristem?
A. It is found in the central region of the seedling. B. Its central zone maintains actively dividing cells. C. It gives rise to stems, leaves, and flowers. D. It has an organizing center that preserves the correct number of stem cells. E. Its peripheral zone contains dividing and differentiating cells.
What is the underlying problem in most acquired immunodeficiencies?
A. declining cell-mediated immunity B. declining humoral immunity C. production of autoantibodies D. eosinophilia E. anemia