Exam 3 Secondary Growth in Stems

In a biennial:

the entire life cycle occurs within two growing seasons.

The meristematic cells of the vascular cambium are:

fusiform initials and ray initials.

Fascicular cambium is located:

between the xylem and phloem within the vascular bundles.

During secondary growth, periderm replaces the:

epidermis

Which of the following statements about cork cells is FALSE?

They are highly permeable to water and gases.

Which of the following statements about the outer bark is FALSE?

It does not include a periderm.

In radial section of conifer wood, the:

rays appear as sheets of cells at right angles to the tracheids.

Unlike heartwood, sapwood:

conducts water and minerals.

The single most important indicator of the strength of wood is its:

density

Secondary growth originates in the

lateral meristem.

In the secondary growth of vascular tissue

anticlinal divisions maintain the cambium (meristems) whlie periclinal divisions produce one meristem cell and one for differentiation.

Tree rings (growth rings) occur because

trees grow rapidly in the spring and early summer resulting in less dense wood, and slower in the later summer and fall, resulting in more dense wood.