Welcome to the Quiz!
This quiz contains 12 questions from a mix of 1 subtopics.
What is/are function(s) of xylem tissue in plants?
(Select all that apply)
to transport amino acids
to transport sugars
to transport water and mineral ions
to provide structural support
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Which of the following are adaptations of xylem vessels?
(Select all that apply)
elongated tubes without end walls
companion cells with mitochondria to release energy
pits that allow movement of water and ions
walls thickened with lignin for support
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What is the main role of phloem tissue in plants?
to store energy
to provide structural support
to transport sugars and amino acids
to transport water and mineral ions
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Which of the following are components of phloem tissue?
(Select all that apply)
sieve tube elements
companion cells
mesophyll cells
xylem vessels
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What is the main function of companion cells in phloem tissue?
to provide structural support
to store nutrients
to release energy for sieve tube elements
to transport water and mineral ions
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In the roots of herbaceous dicotyledonous plants, how are xylem and phloem tissues distributed?
phloem forms a central cylinder surrounded by xylem
xylem and phloem form a network of veins
xylem and phloem are in the outer region of the root
xylem forms a central cylinder surrounded by phloem
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In the leaves of herbaceous dicotyledonous plants, how are xylem and phloem tissues distributed?
they are located only in the central region of the leaf
they form a network of veins
they are absent in the leaves
they are randomly distributed throughout the leaf
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Why do plants require transport systems?
substances only need to be moved over short distances
diffusion is fast enough to meet their metabolic needs
they are unicellular with a high surface area to volume ratio
they are multicellular with a low surface area to volume ratio
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What provides structural support in xylem vessels?
lignin in the cell walls
sieve plates at the ends
companion cells
pits in the cell walls
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Which of the following is NOT an adaptation of sieve tube elements in phloem tissue?
they have large nuclei and many mitochondria
they are connected end-to-end to form tubes
they have only a thin layer of cytoplasm
they have sieve plates with pores at ends to allow flow
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What is the role of pits in xylem vessels?
to provide structural support
to allow movement of water and ions into and out of vessels
to connect sieve tube elements to companion cells
to store nutrients
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Where are xylem and phloem tissues located in a vascular plant?
only in the leaves
throughout the plant, connected in a vascular system
only in the stems
only in the roots
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