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A scientist observes thin, rectangular, tightly packed cells forming a single outer layer on a leaf. The tissue is most likely:

AEpidermis
BXylem
CLateral meristem
DPhloem
Answer & Solution
Correct answer: A. Epidermis
Epidermis is described in the chapter as a single layer of flat (rectangular) tightly packed cells covering the outermost surface of plant parts. Xylem and phloem are internal conducting tissues. Lateral meristem is a ring deep inside the stem. **So the description matches epidermis.**
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