The method for DNA sequencing was developed by:
a. Jacob.
b. Watson.
c. Hershey.
d. Avery.
e. Sanger
E
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A rock contains 18 mg of the radioactive isotope carbon-14. The half-life of carbon-14 is 5,600 years. How many half-lives and years will it take before the carbon-14 decays to less than 4 mg?
A. 1 half-lives; 5,600 years B. 2 half-lives; 11,200 years C. 3 half-lives; 16,800 years D. 4 half-lives; 22,400 years E. 9 half-lives; 50,400 years 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 half-lives of radioactive isotopes? What other information is related to the question? Choose Answer Given what you now know, what information 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 of the following is a chemoheterotroph?
A) grass B) a tree C) a mushroom D) a photosynthetic bacterium E) algae
________ is the process of generating many copies of a specific DNA fragment
Fill in the blank with correct word.
Pasteurization is a technique in which heat is applied to liquids to kill potential agents of infection and spoilage, while at the same time retaining the liquid's flavor and food value.
a. true b. false