Carbon dioxide is carried from the tissues to the lungs by a variety of mechanisms
Which of the following lists these mechanisms in order representing the mechanism that carries the most carbon dioxide to the mechanism that carries the smallest amount? A) bicarbonate—carbaminohemoglobin—dissolved in plasma
B) bicarbonate—dissolved in plasma—carbaminohemoglobin
C) dissolved in plasma—bicarbonate—carbaminohemoglobin
D) carbaminohemoglobin—bicarbonate—dissolved in plasma
E) carbaminohemoglobin—dissolved in plasma—bicarbonate
A
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DNA replication is said to be semiconservative because ____
a. the number of nucleotides within genes remains constant b. half of the DNA in a cell comes from one parent and the other half from the other parent. c. the same process of DNA replication is used by all organisms d. the total amount of DNA within an individual remains the same e. each new DNA molecule is composed of one old strand and one new strand
The three stress hormones are _____
a. cortisol, FSH, and LH b. epinephrine, cortisol, and FSH c. norepinephrine, cortisol, and FSH d. epinephrine, norepinephrine, and cortisol e. epinephrine, norepinephrine, and FSH
A fruit is a mature
A) cotyledon. B) ovary. C) embryo. D) integument. E) endosperm.
The similarities in function of hummingbird wings and the wings of a butterfly reflect
A) homology but not analogy. B) homology through convergent evolution. C) analogy and homology. D) analogy but not homology.