In biology lab, your class counts the number of people with different colors of hair and eyes. Your instructor says that these traits are variable and difficult to trace in each family. The reason is that these two traits depend on more than one gene, and are called
A. recessive.
B. incomplete dominant traits.
C. codominant.
D. pleiotropic.
E. polygenic.
E. polygenic.
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Transmembrane proteins involved in detecting external stimuli and relaying that information to the cell are most likely ________ proteins.
Fill in the blank(s) with the appropriate word(s).
Biological magnification is best defined as ____
a. the increase in toxicity of a chemical compound resulting from its metabolism by a living organism b. the higher relative proportion of biomass among producers as compared to consumers in an ecosystem c. the concentration of nondegradable poisons within organisms at higher trophic levels d. the concentration of degradable poisons within organisms at lower trophic levels e. the declining relative proportion of nondegradable poisons in organisms at higher trophic levels as compared to those at lower trophic levels
Which of the following structural components
is NOT a part of a bacteriophage?
a. protein coat b. DNA c. viral envelope d. all of these ARE parts of a bacteriophage e. more than one of these is NOT a part of a bacteriophage
Plant roots absorb nitrate or ammonia and incorporate these compounds into plant proteins via the process of:
a. ammonification. b. denitrification. c. assimilation. d. nitrogen fixation. e. nitrification.