The area of the retina that lacks photoreceptive cells is called the
Ans: optic disc
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If a strain of bacteria had a mutation that blocked expression of the lac repressor, what would you expect as a result?
A. The mutant strain would outcompete wildype strains, since it could always utilize lactose. B. The mutant strain would grow at the same rate as wildtype if lactose was not present. C. The mutant strain would waste energy producing enzymes in the absence of lactose. D. The mutant strain would act the same, because it would still require lac activator protein to turn on. 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 the lac operon? 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?
Where are the light-capturing pigments located in a chloroplast?
A. outer membrane B. inner membrane C. transitional membrane D. thylakoid membrane
Polymerase Chain Reaction is a technique to produce multiple copies of a sequence of DNA
Indicate whether the statement is true or false.
Crop sunflowers are attacked by many fungal pathogens, such as downy mildew and Sclerotinia, resulting in economic losses of millions of dollars per year. What genes would be best to target for the development of new fungus-killing crop treatments (fungicides)?
A. genes encoding chitin proteins that are shared by downy mildew and Sclerotinia, but absent in sunflower and humans B. genes encoding metabolite proteins that are shared by downy mildew, Sclerotinia, and humans, but absent in sunflower C. genes encoding basic development proteins that are shared by downy mildew, Sclerotinia, sunflower, and humans D. genes encoding growth proteins that are shared by downy mildew, Sclerotinia, and sunflower, but absent in humans