Evolution must include a change in
A. The recessive phenotype
B. The percentage of individuals in a population with the dominant phenotype
C. The gene pool of a population
D. The genes of an individual
E. The dominant phenotype
C. The gene pool of a population
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Alders are trees with symbiotic nitrogen fixing bacteria in their roots. This enables alders to be a key part of _________ in recently glaciated areas in Alaska.
A. species extinction B. emigration C. primary succession D. inhibition E. secondary succession
The undulating membrane of Parabasala is used for
a. defensive purposes. b. asexual reproduction. c. structural support. d. food absorption. e. movement.
Four of the five drugs listed below are analgesics
Select the exception. a. endorphin b. opium c. heroin d. enkephalin e. Ecstasy
Some friends are trying to make wine in their basement. They've added yeast to a sweet grape juice mixture and have allowed the yeast to grow. After several days they find that sugar levels in the grape juice have dropped, but there's no alcohol in the
mixture. The most likely explanation is that the A) mixture needs more sugar because yeasts need a lot of energy before they can begin to produce alcohol. B) mixture needs less oxygen because yeasts only produce alcohol in the absence of oxygen. C) mixture needs more oxygen because yeasts need oxygen to break down sugar and get enough energy to produce alcohol. D) yeast used the alcohol as a carbon source.