The most widely accepted and supported model that explains the movement of phloem sap in flowering plants is the
____ mechanism.
a. cohesion-tension
b. translocation
c. pressure flow
d. osmosis
e. transpiration
ANSWER: c
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Fruit flies, mollusks, and humans have insulin-like hormones and receptors, even though molecular
studies suggest that their last common ancestor existed more than 800 million years ago.
Indicate whether the statement is true or false.If the 13 CODIS SSR loci are genotyped, why does each person (except identical twins) have a unique combination of SSR alleles?
A) Each SSR locus has many alleles, each with a different number of repeats. B) SSRs have a very low mutation rate in individuals. C) SSR inheritance follows Mendel's law of segregation. D) Mitotic recombination results in new combinations of SSRs in different parts of an individual's body.
All woody plants are:a
annuals. b. biennials. c. perennials. d. deciduous. e. evergreen
An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to _____
A) change the atmosphere from oxidizing to reducing B) make it easier to maintain reduced molecules C) cause iron in ocean water and terrestrial rocks to rust (oxidize) D) prevent the formation of an ozone layer