Exam 26: Secondary Growth in Stems

In the elderberry stem during its first year of secondary growth, all primary phloem cells are destroyed.

The cambial zone consists of the fusiform initials and their immediate derivatives.

At the end of the first year's secondary growth, immediately outside the primary xylem is the:

In angiosperms, early wood ______ than late wood.

Interfascicular cambium arises:

The cambial zone consists of:

The stem and root of most woody plants usually contains only one periderm.

At the end of the first year's secondary growth, immediately inside the secondary phloem is the:

In the cork oak, the cork produced by the first cork cambium has the least commercial value.

Ring-porous woods are different from diffuse-porous woods because in ring-porous woods:

Which of the following statements about lenticels is FALSE?

Wood contains mostly:

Woody perennials usually keep growing during unfavorable seasons.

______ is thought to block the movement of water or gases through a pit-pair in conifer tracheids.

In most woody plants, the first periderm usually arises in the:

Angiosperm wood differs from conifer wood in that angiosperm wood has:

Which of the following statements about secondary growth is FALSE?

Heartwood is different from sapwood in that heartwood:

In secondary tissues, the cells of the axial system are oriented vertically and those of the radial system are oriented horizontally.

In diffuse-porous woods, the pores are fairly uniform in size and distribution throughout the growth layers.