Which of the following statements about sexually transmitted diseases is true?
a. Nearly all STDs have severe and obvious ongoing symptoms.
b. STDs are annoying and uncomfortable but they are never fatal.
c. STDs can be transmitted through the mouth or the anus.
Answer: c. STDs can be transmitted through the mouth or the anus.
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Which of the following would be least likely to cause DNA damage to an individual suffering from xeroderma pigmentosum?
A) direct sunlight B) tanning beds C) incandescent light bulbs D) reflected sunlight
Which of the following two enzymes are needed to construct a cDNA library?
A. reverse transcriptase and DNA ligase B. reverse transcriptase and Taq polymerase C. DNA ligase and Taq polymerase D. Taq polymerase and RNA polymerase 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 DNA libraries? 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?
Which time period of Earth represents when evolution was progressing at the most rapid rate, as evidenced by fossils
such as those of the Burgess Shale? a. Silurian period b. Cambrian period c. Devonian period d. Ordovician period e. Carboniferous period
The vessel that collects blood from the superficial structures of the head and neck is the ________ vein.
A) external carotid B) internal carotid C) external jugular D) internal jugular E) All of the answers are correct.