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