Which of the following mechanisms is (are) used to coordinate the expression of multiple, related genes in eukaryotic cells?
A) Environmental signals enter the cell and bind directly to promoters.
B) The genes share a single common enhancer, which allows appropriate activators to turn on their transcription at the same time.
C) The genes are organized into a large operon, allowing them to be coordinately controlled as a single unit.
D) A single repressor is able to turn off several related genes.
Answer: B
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Inside its beak an octopus has a rasping tongue that is used to tear apart food. Which gastropod structure is this analogous to?
A. Mantle B. Shell C. Radula D. Nephridium Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about mollusk feeding? 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?
Refer to Figure 31-5. In which class is this organism placed?
A. Cephalopoda
B. Gastropoda
C. Polyplacophora
D. Bivalvia
E. Chromodoris
Which of the following is not a function of stems?
a. modified for sexual reproduction b. absorb nutrient minerals c. produce new tissues d. transport water and dissolved nutrient minerals e. support leaves and flowers
When you first move to a city, you can hardly sleep because of the nighttime traffic noise. Within a week, you don't notice it at all. This is an example of ________
Fill in the blank(s) with correct word