Algins, thickening compounds used in the food industry, are obtained from ____
a. foraminiferans
b. brown algae
c. dinoflagellates
d. red algae
e. green algae
ANSWER: b
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Glycosylated proteins and lipids within the plasma membrane are important for
A. cell recognition. B. cell protection. C. cell energy storage. D. cell recognition and protection. E. cell protection and energy storage.
What change would increase the rate of oxygen diffusing from lung alveoli into the blood?
A. A decrease in the pH of the blood entering the lungs B. An increase in the hemoglobin concentration of the red blood cells C. An increase in the partial pressure of oxygen in the blood entering the lungs D. An increase in the humidity of air in the lungs E. A decrease in the partial pressure of oxygen in the alveoli 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 diffusion? 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?
Cells produced by dividing B or T cells may immediately begin to destroy an invader. These cells are
called a. effector cells. b. memory cells. c. dendritic cells. d. phagocytes. e. fibroblasts.
Individuals using drugs such as cocaine over extended periods of time find that they need increasing amounts just to feel okay. Why?
What will be an ideal response?