Plant Biology: Chapter 24: The Root: Structure And Development

When a seed germinates, the _________________ is the first structure to emerge

The two primary functions of roots are:

Which of the following statements concerning roots is FALSE?

The rhizosphere is the volume of:

In gymnosperms and eudicots, the primary root is called:

Which of the following statements about monocot roots is FALSE?

Which of the following statements about feeder roots is FALSE?

After you transplant a shrub, which of the following is the more effective next step you should do to increase the chances that the shrub will survive?

Which of the following statements about the rootcap is FALSE?

Which of the following statements about border cells is FALSE?

Gravity-and water-potential gradients are perceived by the:

The promeristem of the root:

In a "closed type" of root apical organization, the:

Which of the following statements about the quiescent center is FALSE?

The sequence of regions in a growing root, beginning immediately behind the rootcap, is:

Root hairs are produced in the:

Protopholem and protexylem mature in the:

The _______________ occupies the greatest area of the primary root

Aerenchyma is found in the:

Substances moving throughout the root cortex:

The innermost layer of the cortex is the:

Which of the following statements about Casparian strips is FALSE?

The presence of Casparian strips forces substances entering and leaving the vascular cylinder to pass through the protoplasts of _________________ cells

Suberin lamellae, such as those found in some older roots, are alternating layers of:

Endodermal cells that do not become suberized in older roots are called _______________ cells

Which of the followng statements about exodermis is FALSE?

The outermost layer of a root's vascular cylinder is the:

At the center of most eudicot root is:

The protoxylem poles are located next to the:

Primary pholem is located between the:

In the center of maize roots is:

The vascular cambium is initiated by cells:

In roots, the vascular cambium arises from the:

As the vascular cambium continues to divide during secondary growth of the root, most of the primary pholem:

In roots, cork cambium arises in the:

Immediately inside the cells of the cork cambium is:

If you placed your hand on the outer surface of a root that is one meter in diameter, you would be touching:

In a woody root one meter in diameter, which tissue would NOT be present?

In angiosperms, cells of the _______________ and the ______________ contribute to lateral root formation

A stilt root is an example of a(n):

A pneumatophore is:

Valemen is a(n):

Which of the following statements about supernumerary cambia in sugarbeet roots is FALSE?

The root systems of eudicots are well suited to preventing soil erosion

An example of the developmental plasticity of roots is the rapid development of lateral roots into nutrient rich soil

In most trees, 10 percent of their roots are located in the upper 2 feet of soil

If "fine roots" are damaged or destroyed, they cannot be replaced

In seedlings, the total water-and mineral absorbing surface of the roots usually exceeds the photosynthesizing surface of the leaves and stem

Cells of the root cap columella secrete a highly hydrated polysaccharide called mucilage

Border cells undergo programmed cell death immediately after being separated from the root

The lateral rootcap receives gravity

In an "open type" of root apical meristem, all regions arise from one group of initials

The quiescent center contains cells that cease to divide when bordering meristematic cells are injured

Casparian strips are located in the anticlinal walls of endodermal cells

All substances entering the vascular cylinder must pass through living cells of the endodermis

The endodermis is found in the outermost layer of cells of the cortex

The terms "diarch" and "triarch" refer to the number of xylem ridges in a root's vascular cylinder

Most moncot roots lack sencondary growth.

In roots, cells of the pericycle contribute to the vascular cambium

The vascular cambium of roots produces secondary xylem toward the outside and secondary pholem toward the inside

In roots, cells of the pericycle contribute to the vascular cambium

The cork cambium produces phelloderm toward the outside and cork toward the inside

Lenticels are found in the periderm and permit passage of air

Most likely epidermis would be present in a 10-year-old wood root

Lateral roots orginate from cells of the vascular cambium

Prop roots are types of lateral roots common in tropical trees

Sweet potatoe roots have a single vascular cambium that produces storage parenchyma