Which of the following phenomena will be observed if a cell's membrane is pierced?
(a) the membrane reseals
(b) the membrane collapses
(c) a tear is formed
(d) the membrane expands
(a)
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The mRNA that would most likely have the longest half-life would:
A. containan exon junction complex bound downstream of a stop codon. B. lack a stop codon. C. containan AU-rich element in the 3'-UTR. D. containone or more hairpin structures.
In plants, the ground tissue functions
a. to transport sugars. b. to transport dissolved minerals. c. to protect the cambium. d. to form the woody parts. e. to support the plant and store materials.
What important role do fungi play in many ecosystems?
A) They decompose organic material. B) They pollinate plants. C) They disperse the fruits of angiosperms. D) They perform photosynthesis.
Which of the following statements regarding the surface of the skin is false?
A. It has sebum as a coating. B. It has normal microbiota. C. It has goblet cells. D. It is salty. E. It is acidic.