Plant photosynthesis and the consumption of plants by animals are both examples of what unifying principle of life?

A. All living organisms use energy.
B. All living organisms maintain organization.
C. All living organisms maintain some level of homeostasis.
D. All living organisms are composed of similar structures.
E. All living organisms have evolved over the course of many generations.


Answer: A

Biology & Microbiology

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Explain why the yellow solution in the graduated cylinder became a reddish color after it was incubated in the light with stems of Elodea.

What will be an ideal response?

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You want to engineer a yeast cell to manufacture and secrete a bacterial protein product. To do this properly, you need to make certain that

A) the appropriate signal sequence is present. B) plenty of clathrin-coated pits may be formed. C) mannose-6-phosphate is added to the protein. D) the yeast cell is capable of phagocytosis. E) all of the above

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The two major categories of extracellular signal molecules that bind to cell surface receptors are ____

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An uncharged atom of gold has an atomic number of 79 and an atomic mass of 197. This atom has ________ protons, ________ neutrons, and ________ electrons

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Biology & Microbiology