Exercise
Form 3: Structure and Function of Phloem Vessels
Explore the structure and function of phloem vessels in plant transport. Understand how phloem distributes nutrients and dissolved organic compounds across plant tissues.
Questions
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MultiChoice
Unlike xylem, phloem tissue consists of cells that are:
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MultiChoice
What specialized end walls connect sieve tube elements in phloem?
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MultiChoice
Which cell type lies adjacent to sieve tube elements and supports their metabolic functions?
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MultiChoice
What energy molecule do companion cells provide to assist phloem transport?
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MultiChoice
What organic molecule is transported in the highest quantity through phloem?
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MultiChoice
In plant transport terminology, what is a 'source'?
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MultiChoice
Which of the following acts as a sugar 'source' during late spring?
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MultiChoice
Which of the following acts as a sugar 'sink' in a growing plant?
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MultiChoice
How can storage tubers (like potatoes) act as a sugar 'source'?
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MultiChoice
How does sucrose move into sieve tube elements at the source?
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MultiChoice
What happens to water movement when sucrose concentrations rise in phloem at a source?
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MultiChoice
Why do sieve tube elements lack a cell nucleus at maturity?