Mutations can be
a. neutral.
b. beneficial.
c. lethal.
d. heritable.
e. all of these
E
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The range of the grizzly bear in the 48 contiguous United States is now less than 1% of what it was in 1800. What has been proposed to help maintain genetic variation in the remaining populations of this species?
A. protected corridors between all of the remaining populations B. regular exchange of bears between isolated populations C. proserving more small patches of forest D. cloning of the most genetically diverse remaining females E. establishment of new parks in Colorado and New Mexico
During ________ proteins are moved from the cytoplasm to the membrane or periplasmic space, while during ________ proteins are moved from the cytoplasm to the external environment.
A. translocation; translation B. secretion; translation C. transcription; translation D. secretion; translocation E. translocation; secretion
According to the law of segregation, in an organism with the genotype Aa
A) one-quarter of the gametes get the A allele and three-quarters get the a allele. B) three-quarters of the gametes get the A allele and one-quarter get the a allele. C) all of the gametes get the A allele. D) one-half of the gametes get the A allele and one-half get the a allele. E) all of the gametes get the a allele.
On a trip to the beach, you find a multicellular organism whose cells have chloroplasts and cell walls. Based on this description, you know that the organism could be a brown alga, a red alga, a green alga, or a land plant washed into the ocean. The presence of which of the following would allow you to definitively identify this organism as a plant?
A) Multicellular embryo B) Starch C) Cellulose D) Alternation of generations E) Chlorophyll a