Which molecule comprises the largest proportion of the carbon reservoir in the ocean?
a. carbon dioxide
b. carbonic acid
c. bicarbonate ion
d. carbonate ion
c. bicarbonate ion
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The ____ is the initial opening between the developing gut and the outside environment for most
animal embryos.
a. schizocoelom b. mesoglea c. archenteron d. enterocoelom e. blastopore
Water takes longer than air to warm up or cool off because of water's high
A) specific heat. B) viscosity. C) surface tension. D) density.
Most biological molecules are joined by
A) hydrogen bonds. B) peptide bonds. C) covalent bonds. D) ionic bonds. E) disulfide bonds.
How have Caesarean sections and intensive neonatal (near-birth) medical care likely affected the average birth weight of American babies?
A) Stabilizing selection for birth weight no longer has as much of an influence. B) Average birth weights have significantly decreased. C) Gene flow will occur in the direction of larger and smaller infants. D) Birth weight is now subject to disruptive selection instead of stabilizing selection.