Virginia Commercial Applicator Turf Category 3B Practice Test

Which tissue is located in the inner bark and transports sugars?

Phloem Xylem Epidermis Cortex

Correct Answer:

Phloem

Explanation:

Sugars that are made in the leaves must be moved to other parts of the plant, and this transport is carried out by phloem. Phloem lies in the inner part of the bark and contains sieve tube elements and companion cells that actively transport sugars (mainly sucrose) from sources (like leaves) to sinks (growing tissues, roots, fruits). In contrast, xylem moves water and minerals from the roots upward, and epidermis and cortex are outer and middle layers of tissue that don’t function in sugar transport. So the tissue in the inner bark that carries sugars is phloem.

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