In microscopy, resolution can be defined as the:
a. magnification power.
b. extent to which detail in the magnified object is maintained.
c. ability of objects to stand out from the background.
d. ability to see objects against a black background.
B
The extent to which detail in the magnified object is maintained is called resolution.
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One day during the summer you and some friends make ice cream using an electric ice cream maker. To get the ice cream to form, a mixture of salt and ice is packed around the ice cream maker. A few days later you notice a yellow circle of dead grass where the ice cream maker had been placed. You hypothesize that some of the salt and ice mixture spilled onto the grass and ___.
A. froze the grass B. was isosmotic to the grass cells causing the yellow circle of dead grass C. was hyperosmotic to the grass cells causing the yellow circle of dead grass D. was hypoosmotic to the grass cells causing the yellow circle of dead grass Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you know about osmotic concentration? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
Which of the following molecules would you predict moves through a lipid bilayer most rapidly?
A. C6H12O6 B. CH3OH C. C2H5OH D. C4H10 E. NH2SO2CH3
Type II survivorship curves ____
a. are characteristic of humans and elephants b. indicate a fairly constant rate of death at all ages c. indicate a high mortality rate in the very young d. are characteristic of species in which most individuals live a relatively long life and die of old age e. are typical of species with high biotic potentials
Imagine that a random mutation results in a bacterial cell gaining the ability to grow in an environment with a salt concentration of 13%. The population this mutated cell arose from is growing in an environment with a salt concentration of 1.0%. Over the next 3 weeks the salt concentration of the environment fluctuates between 0.9% and 1.0%. What would you predict might happen to the population over these three weeks?
A) In this example the ability to grow in an increased salt concentration provided the mutated cell with a distinct advantage, therefore the mutated cell was selected for and it began to dominate over the three week period. B) In this example the ability to grow in an increased salt concentration did not provide the mutated cell with any advantage, it was not selected for and did not dominate the population over the three week period.