Aerating pores located in the bark that facilitate gas exchange and water loss via vapor are called___________?
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Answer: C. Lenticels
Explanation
Lenticels are porous, spongy tissue regions in woody bark facilitating gas exchange. They allow oxygen and carbon dioxide to pass between internal plant tissues and the atmosphere. They also permit minimal water loss in the form of vapor through woody stems. Woody stems develop a thick protective bark layer that blocks normal stomatal gas exchange. Lenticels break through this bark barrier, creating microscopic raised pathways for air. They appear as small raised dots or streaks on the surface of tree branches.
Horticulturists observe lenticels when identifying various tree species during winter months. Certain plant diseases can infect woody stems by entering directly through open lenticel pores. Flooding can clog lenticels, suffocating roots and lower stems of sensitive woody plants. Option A is wrong because hydathods are specialized leaf structures that exude liquid water droplets. Option B is incorrect because stomata are leaf pores rather than woody bark aerating structures. Option D fails because lenticel is indeed the correct and standard term for these pores.
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