How can you always distinguish a root cross section from a stem cross section? R
ID: 172524 • Letter: H
Question
How can you always distinguish a root cross section from a stem cross section?
Roots have a pith in the middle, stems do not.
Roots have vascular bundles, stems do not.
Roots never have a bark/cork cambium layer, and stems always do.
Roots have their vascular tissues in the stele in the center of the root, and stems do not.
Roots have stomatal guard cells, and stems do not.
Which of the following statements is FALSE?
The veins in a leaf are continuous with the veins of a stem.
Tissues that are neither dermal nor vascular are known as the ground tissue system.
Each vein in a leaf is composed of either xylem or phloem, but not both.
The ground tissue system of a leaf is called the mesophyll.
The pith of a stem is often important in food storage.
A.Roots have a pith in the middle, stems do not.
B.Roots have vascular bundles, stems do not.
C.Roots never have a bark/cork cambium layer, and stems always do.
D.Roots have their vascular tissues in the stele in the center of the root, and stems do not.
E.Roots have stomatal guard cells, and stems do not.
Explanation / Answer
Answer:
1). C. Roots never have a bark/cork cambium layer, and stems always do.
Explanation:
Pith is present in the middle of root and stem. Both, roots and stems have vascular bundles and vascular tissue in the stele. Stems hace stomatal guard cells but roots do not.
2). C. Each vein in a leaf is composed of either xylem or phloem, but not both.
Explanation:
Each vein in a leaf is composed of both the xylem and phloem.
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