Autotrophs include which of the following?
(a) fungi.
(b) plants.
(c) animals.
(d) all of the above.
(b) plants.
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A microbial ________ is a collection of strains that share many stable properties and differ significantly from other groups of strains.
Fill in the blank(s) with the appropriate word(s).
Mendel found that pea plants expressing a recessive
trait a. were pure-breeding. b. appeared only in the first generation of a cross between two pure-breeding plants expressing contrasting forms of a trait. c. disappeared after the second generation. d. could be produced only if one of the parents expressed the recessive trait. e. were none of these.
Why is there a problem in replicating the ends of linear DNA molecules?
What will be an ideal response?
What can happen if an enzyme is altered, even slightly?
A) It will continue to catalyze reactions, but at a slower rate. B) It will still catalyze reactions, but only at a higher temperature. C) The amount of activator required to "turn on" the enzyme will need to increase. D) Its active site may change, causing the enzyme to stop functioning. E) It will catalyze reactions too quickly, potentially causing illness for the individual.