In Tilman's experiments with diatoms, what was the outcome when the two species competed for silica?
A) Both coexisted.
B) Both survived several years but one eventually won out.
C) One outcompeted the other to extinction.
D) Both died.
C
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If you were given a bacterial strain with a mutation in the promoter region of the trp operon the most likely effect would be
A. interference with RNA polymerase binding. B. to block the repressor from binding. C. derepression of the trp operon. D. enabling the trp operon to be expressed in the absence of tryptophan. E. lack of expression of just the first gene in the operon. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about promoters? Consider Possibilities · Consider the different answer options. Which can you rule out? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Why did Mendel perform reciprocal crosses?
A) To obtain enough plants to perform the experiments that Mendel wanted. B) To test a hypothesis that stated the ovum carries all the information for progeny. C) To be able to breed plants year round. D) To determine whether the inheritance of a trait depends on which parent carries the trait.
Genetic information is stored in DNA
a. True b. False Indicate whether the statement is true or false
As pyruvate is prepared for the citric acid cycle, it undergoes a process of
A) reductive carboxylation. B) oxidative decarboxylation. C) oxidative carboxylation. D) reductive decarboxylation. E) substrate level phosphorylation.