Mesoderm gives rise to
A. epidermis.
B. digestive tract.
C. respiratory tube.
D. peripheral nervous system.
E. skeletal muscle.
Answer: E
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If a cell has a normal osmotic pressure of 4500 mmHg and is placed into a solution with an osmotic pressure of 3500 mmHg, what will happen to the cell?
A. The cell will lose water and its osmotic pressure will decrease. B. The cell will gain water and its osmotic pressure will decrease. C. The cell will gain water and its osmotic pressure will increase. D. The cell will lose water and its osmotic pressure will increase. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about how a cell responds to differences in osmotic pressure? What other information is related to the question? 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?
A gram-negative, spiral-shaped organism is isolated from a stool sample that was hippu-rate-positive, catalase-positive, susceptible to nalidixic acid, and resistant to cephalothin. The organism can be identified as:
a. Campylobacter coli. b. C. jejuni subsp. doylei. c. C. jejuni subsp. jejuni. d. C. fetus subsp. fetus.
When the birth rate plus immigration equals the
death rate plus emigration the result is a. logistic growth. b. exponential growth. c. population saturation. d. zero population growth. e. geometric growth.
Which of the following statements regarding Bacillus anthracis is incorrect?
A. It is a gram-positive bacillus. B. A capsule and exotoxins are virulence factors. C. Its reservoir includes grazing animals and soil. D. It grows primarily under anaerobic conditions. E. It is capable of forming endospores.