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.