Bio 3: Chapter 35
fibers
Although the same cell types can be found in both primary and secondary phloem, ____ are usually more abundant in secondary phloem.
pith
At the center of an herbaceous eudicot stem is:
sucrose
Before being loaded into the phloem for translocation, the carbohydrates produced during photosynthesis must be converted into which molecule?
secondary xylem
Cells produced on the inside of the vascular cambium differentiate to form which vascular tissue?
periderm
Cork cambium and the tissues it produces are collectively known as
the dates of past earthquakes and volcanic eruptions
Dendrochronology can be useful in determining:
phloem
Dissolved sugars are transported in
rays
In woody plants, the lateral transport of materials occurs through:
permit gas exchange through the periderm
Lenticels function to:
cork cambium
Periderm is produced by:
sieve tube elements
Secondary xylem contains all of the following cell types except
of cone-bearing gymnosperms.
Softwood is the wood:
high sugar concentration; low sugar concentration
Sugar is translocated in phloem from a source, or an area of ____, to a sink, or an area of ____.
active transport
The loading of dissolved sugars into the sieve tube elements of phloem is:
vascular cambium
The thin layer of meristematic cells located between xylem and phloem is referred to as the
secondary xylem
Vascular cambium gives rise to which of the following tissues?
xylem; phloem
Water and dissolved mineral are transported laterally from the secondary ____ to the secondary ____
pull of transpiration
Water is capable of rising to the tops of the tallest trees due to the:
less negative; more negative
Water moves from a region of ____ water potential to a region of ____water potential.
It functions in conduction.
Which of the following statements about heartwood is false?
It may contain collenchyma and sclerenchyma
Which of the following statements about the cortex is true?
upward
Xylem transports water and dissolved nutrient minerals in which direction?
Sucrose
___ is the predominant photosynthetic product carried in phloem.
Periderm
____ is the functional replacement for the epidermis.
Hardwood; softwood
____ is the wood of flowering plants and ____ is the wood of conifers
stems
____ join roots to leaves and may be above or underground.