Exam 26: Secondary Growth in Stems

Cambial initials produce ______ cells toward the outside and ______ cells toward the inside.

Compression wood:

After the first periderm is formed, additional periderms originate from ______ cells.

Fascicular cambium arises from procambium immediately outside the vascular bundles.

In wood having a high specific gravity, the fibers have ______ walls and ______ lumens.

Secondary growth in the Tilia stem is different from that in the Sambucus stem because in the Tilia stem:

Growing seasons with favorable environmental conditions produce narrower growth rings than seasons with unfavorable conditions.

Which of the following statements about lenticels is FALSE?

Wood contains mostly:

Which of the following statements about vascular rays is FALSE?

Compression wood is a type of reaction wood found in angiosperms.

Biennials form roots, stems, leaves and flowers in the first growing season and seeds in the second season.

Which of the following statements about woody perennials is FALSE?

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

At the end of the first year's growth, bark is composed of:

Hardwood is another name for angiosperm wood.

Lenticels function primarily in:

The meristematic cells of the vascular cambium are the fusiform initials and the interfascicular initials.

The periderm consists of:

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