What is the main benefit of having hemoglobin in the blood?
A. It increases the amount of oxygen that can
be carried in the blood.
B. It keeps oxygen separated from carbon
dioxide within the blood.
C. It increases the solubility of carbon dioxide
in the blood plasma.
D. It is an important source of iron for body
cells.
E. All of the answer options are correct.
A
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Antihistamines are most likely to interfere directly with which of the following nonspecific immune responses?
a. constriction of bronchioles b. leaking of fluid into infected tissues c. production of mucus d. production of antibody e. activation of natural killer cells
If the two alleles for a particular gene are different the gene pair is
a) homologous. b) heterozygous. c) homozygous. d) dominant. e) recessive.
Which animals would be classified as continuous feeders?
A. worms, clams, and crayfish B. clams, crickets, and dolphins C. clams, baleen whales, and oysters D. oysters, hummingbirds and planarian E. None of these groups are all continuous feeders.
Smallpox is caused by infected rats
Indicate whether the statement is true or false