The zone size obtained in the Kirby-Bauer test is influenced by the drug's
A. size.
B. stability.
C. concentration.
D. All of the choices are correct.
D
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A marine fish is ________ and tends to ________ water to/from the environment
A) hyperosmotic; gain B) hyperosmostic; lose C) hypoosmotic; gain D) hypoosmotic; lose
Which of the following is NOT a valid difference between traditional and modern forms of biotechnology?
A) Modern biotechnology can isolate and manipulate individual genes. B) Traditional biotechnology was based solely on selective breeding. C) Modern forms of biotechnology are slower than traditional forms of biotechnology. D) Traditional biotechnology can produce cloned animals with new genes.
A key difference between simple sugars and more complex sugars (disaccharides and polysaccharides) is that simple sugars:
A) must undergo some preliminary processing before the energy can be released from their bonds. B) are made up of one sugar unit or building block. C) have a particular molecular shape that does not stimulate the sweetness receptors on the tongue. D) are important sources of fuel for cells. E) can be broken down into different types of carbohydrate molecules.
Which of the following statements concerning living phytoplanktonic organisms are true?
1. They are important members of communities surrounding deep-sea hydrothermal vents. 2. They are important primary producers in most aquatic food webs. 3. They are important in maintaining oxygen in Earth's seas and atmosphere. 4. They are most often found growing in the sediments of seas and oceans. 5. They can be so concentrated that they affect the color of seawater. A) 1 and 4 B) 1, 2, and 4 C) 2, 3, and 4 D) 2, 3, and 5 E) 3, 4, and 5