A moth-pollinated flower is likely to have
A. red flowers that open in daytime, a wide landing area, and an odor resembling dead meat.
B. blue or yellow flowers, a wide landing area, and no odor.
C. lightly colored flowers, no landing area, and strong sweet perfume.
D. blue or yellow flowers, a wide landing area, and not very much odor.
E. white flowers with short tubes, a wide landing area, and no odor.
Answer: C
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Which of the following events is least likely to result in a genetic change in a bacterium?
A. pilus formation B. conjugation C. specialized transduction D. generalized transduction E. natural transformation 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 horizontal gene transfer? How does it relate to the question? 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?
Suppose that you performed a version of the Hershey and Chase experiment, this time using 32P-labeled viruses that
insert their double stranded DNA into the DNA of the cells that they infect. The viral DNA is then treated as part of the cell's own DNA and is replicated during DNA replication and passed onto daughter cells when the cell divides. You infect a population of cells with the 32P-labeled viruses, and then let the infected cells go through two generations of cell divisions. If you then examine the cells, you should find 32P-labeled DNA in ____ of the cells.
a. none b. about 1/4 c. about 1/2 d. about 3/4 e. all
The chromosomes are aligned at the spindle equator during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
The splitting of water produces three products. Name and discuss the role of each.
What will be an ideal response?