Exam 23: Cells and Tissues of the Plant Body

By regulating stomata, guard cells control the movement of gases into and out of the plant.

The epidermis replaces the periderm in stems and roots undergoing secondary growth.

From which primary meristem does sclerenchyma develop?

When a botanist uses the word "indeterminate," she is referring to the:

Vessel elements have perforation plates, but tracheids do not.

In vascular plants, food is conducted through:

The increase in the size of most plants results more from cell division than from cell enlargement.

Which of the following statements about sieve cells is FALSE?

The developmental fate of a plant cell is determined mostly by:

______ are types of tracheary elements.

An example of programmed cell death is the differentiation of:

In the stem of a eudicot, cortex is the tissue internal to the vascular strands.

______ is a simple tissue, and ______ is a complex tissue.

Sieve-tube elements lack sieve plates.

Hemp, jute, and flax are composed of sclerenchyma cells.

An example of a trichome is a root hair.

One role of pit membranes in tracheids is to:

Unlike wound callose, definitive callose is deposited at the sieve areas and sieve plates of senescing sieve elements.

Obstruction of water flow by air bubbles is more likely to occur in vessel elements than in tracheids.

Stomata are the ______ between ______.