Laser tweezers are used for
A) testing the purity of a culture.
B) isolating individual cells.
C) separating aerobes from anaerobes.
D) enhancing the growth of fastidious organisms.
Answer: B
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Cushing's syndrome causes weight gain, excessive sweating, and muscle weakness. It can result from either the production of abnormally high levels of cortisol by the body, or overuse of glucocorticosteroid drugs. You are an endocrinologist working with a Cushing's syndrome patient. She is on hormonal birth control pills and takes an occasional ibuprofen. A. cortisol, LH, and FSH B. None -- the birth control pills include corticosteroid hormones. She should switch to another form of birth control. C. cortisol, ACTH, and CRH D. cortisol and ACTH 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 cortisol? 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 is true about guncotton?
a. It is a highly explosive derivative of cholesterol. b. It is used to make gunpowder. c. It is less stable than gunpowder.
d. It is more stable than gunpowder. e. It has a higher activation energy for a reaction with oxygen than gunpowder.
Which of the following characteristics do fungi share with plants?
a. Their cell walls both use cellulose to keep their structure. b. They both have chloroplasts. c. Their cells both have cell walls. d. Their plasma membranes are both stabilized by ergosterol.
Atoms have no electric charge because they have ________.
A) uncharged neutrons in their nuclei B) an equal number of protons and neutrons C) an equal number of protons and electrons D) an equal number of charged and uncharged subatomic particles