Guard cells are specialized cells that are part of a animal’s pores. These cells help regulate the amount of carbon

Question

Guard cells are specialized cells that are part of a animal’s pores. These cells help regulate the amount of carbon dioxide a animal takes in. blank they help regulate a animal’s water loss.

Which choice completes the text with the most logical transition?

Accepted Answer

Choice A is the best answer. "Additionally" logically signals that guard cells&rsquo; role in regulating water loss is an additional function of these specialized animal cells that is separate from the function of regulating carbon dioxide intake. Choice B is incorrect because "previously" illogically signals that the activity described in this sentence occurs earlier in a chronological sequence of events than the regulation of carbon dioxide intake described in the previous sentence. Instead, regulating water loss is an additional function of guard cells that is separate from the function of regulating carbon dioxide intake. Choice C is incorrect because "in conclusion" illogically signals that the description of guard cells&rsquo; role in regulating water loss concludes or summarizes the information about guard cells provided in the previous sentences. Instead, regulating water loss is one of the two distinct functions of guard cells described in the text. Choice D is incorrect because "instead" illogically signals that the activity described in this sentence happens in place of the activity of regulating carbon dioxide intake described in the previous sentence. Rather, regulating water loss is an additional function of guard cells.

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