Hemocyanin:a
combines irreversibly with oxygen for transport within the body of various organisms.
b. is bright red in color when combined with oxygen.
c. has an iron-porphyrin group that is responsible for oxygen transport.
d. is a respiratory pigment found in the blood of some invertebrate and vertebrate species.
e. is a respiratory pigment that is colorless when deoxygenated.
E
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In general, the cold-dwelling thaumarchaeotes are evolving more slowly than the hyperthermophilic crenarchaeotes
Indicate whether the statement is true or false.
Primary spermatocytes develop from the division of
A) male gametes. B) secondary spermatocytes. C) spermatogonia. D) somatic cells.
The accompanying figure represents a:
a. fairly simple food web.
b. fairly simple food chain.
c. pyramid of biomass.
d. pyramid of energy.
e. pyramid of numbers.
pH 4 is ______________x more acidic than pH 7.
Fill in the blank(s) with the appropriate word(s).