base
What will be an ideal response?
a substance that absorbs hydrogen ions and therefore raises pH
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Which extraembryonic tissue burrows into, and thus attaches to, maternal tissues?
a. the amnion b. the yolk sac c. the chorion d. the blastocyst protein coat e. the inner cell mass
Which of the following statements concerning starvation is true?
a. Ketone bodies are rapidly produced. b. Fat metabolism is greatly reduced. c. There is a risk of the blood becoming too basic. d. There are too many phytochemicals in the blood. e. It is safe for obese individuals to undergo starvation
Which of the following statements about the human genome is false?
(a) About 50% of the human genome is made up of mobile genetic elements. (b) More of the human genome comprises intron sequences than exon sequences. (c) About 1.5% of the human genome codes for exons. (d) Only the exons are conserved between the genomes of humans and other mammals.
Compared to plants from other environments, the cells of many desert plants contain high concentrations of solutes
This helps them survive in their arid surroundings because the high solute concentrations create relatively _____, which help reduce water loss. A) low solute potentials B) high pressure potentials C) low pressure potentials D) high solute potentials