Which list represents the proposed sequence in plant evolution?
a. angiosperms >>> bryophytes >>> seedless vascular plants >>> gymnosperms
b. bryophytes >>> seedless vascular plants >>> gymnosperms >>> angiosperms
c. gymnosperms >>> angiosperms >>> bryophytes >>> seedless vascular plants
d. seedless vascular plants >>> gymnosperms >>> bryophytes >>> angiosperms
e. bryophytes >>> gymnosperms >>> angiosperms >>> seedless vascular plants
ANSWER: b
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Some animals have no gills when young, but then develop gills that grow larger as the animal grows larger. What is the reason for this increase in gill size?
A) The young of these animals are much more active than the adult, which leads to a higher BMR (basal metabolic rate) and, therefore, a higher need for oxygen. B) Relative to their volume, the young have more surface area across which they can transport all the oxygen they need. C) The young have a higher basal metabolic rate. D) Relative to their surface area, the young have more body volume in which they can store oxygen for long periods of time.
Compare and contrast the osmoregulatory challenges and solutions used by sharks and freshwater fishes. What will be an ideal response?
Which of the following pairings of recombinant DNA techniques and applications does NOT match?
a. genetic modification of yeast: production of purified insulin b. gene therapy: replacing a defective gene c. PCR: making many copies of a segment of DNA d. gene silencing: production of subunit vaccines
Most plants acquire minerals from
A. soil. B. air. C. digested insects. D. rain.