To inhibit the transcription of operon genes, the lacI gene product binds to
A) the operator.
B) the promoter.
C) the repressor.
D) the inducer.
E) ß-galactosidase.
A
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What is the most likely reason the peronsporomycetes were originally thought to be fungi?
A. Life cycle similar to that of many fungi B. Yeast like cellular morphology C. Cell wall composition D. Macroscopic appearance of fuzzy growth
When scientists examined fossils of Ordovician trilobites, they found that a sample from any given stratum was almost
always intermediate in their morphology between samples from strata just above or below it, providing evidence of ____.
a. convergent evolution b. rapid speciation c. adaptive radiation d. punctuated equilibrium e. phyletic gradualism
If a pea plant is heterozygous for yellow seeds (Yy), which gametes could it produce?
a. y only b. YYyy c. Y or y d. Y only e. Yy
The Hubbard Brook Experimental Forest is best known for what occurring after forest clearing?
A) primary succession B) sere C) secondary succession D) final succession