Which part of the lac operon produces a regulatory protein that is trans-acting?
What will be an ideal response?
lacI
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You are asked to determine whether sulfur bacteria are active in a particular area of an estuary. What observations or tests can you perform to confirm this activity?
What will be an ideal response?
If a population has an allele frequency of 1.0, you would say that
A) the allele frequency is ideal. B) genetic variation of that allele is low. C) genetic variation of that allele is high. D) that allele is under selection.
Which of the following examples of successional processes illustrates how disturbance can lead to alternate stable states (climaxes) in the same habitat?
A) succession of carrion feeders in the African savanna B) replacement of pines by deciduous tree species in the Piedmont of North Carolina C) grazing-induced invasion of cheatgrass and its promotion of fire in western North America D) development of beech-maple forests on Lake Michigan sand dunes
There are 5 independently assorting genes named A, B, C, D and E. If you bred individuals with these genotypes: AABbCcddEE x AaBbCcDDEE, what would be the expected proportion of offspring that would have the following genotype: AABbccDdee?
a) 0 b) 1/16 c) 1/8 d) 1/32