Lymph moves throughout the lymph vessels due to ____
a. contraction of the heart
b. conscious actions
c. constriction of blood vessels
d. dilation of blood vessels
e. skeletal muscle and breathing movements
ANSWER: e
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The liver ____
a. detoxifies toxic substances b. breaks down bile
c. absorbs amylase d. synthesizes lipoproteins e. turns glycogen into glucose
The two amino acids depicted above both have side groups (R groups) that are
a. acidic and polar. b. uncharged and nonpolar. c. basic and polar. d. positively and negatively charged and nonpolar. e. uncharged and polar.
Grasses being replaced with shrubs over time is an example of which of the following?
a. Commensalism b. Parasitism c. Directional selection d. Evolution e. Succession
Suppose that, with regard to a particular genetic locus with two alleles, A and a, we know that 60% of the alleles in the gene pool of a particular large population are A. Suppose further that we observe this population for five generations, during which we know that no mutation, selection, or migration has occurred. After this period, the frequency of the a allele is expected to be _____.
A) 0.6 B) 0.4 C) 0.25 D) 0.16 E) 0.5