Plant Biology (Module 9)

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

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

Which of the following is found in the outer bark but not the inner bark?

Which of the following statements about woody perennials is false?

Lenticels function primarily in:

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

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

Conducting phloem:

Which of the following statements about resin ducts is false?

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

Heartwood is different from sapwood in that heartwood:

“Softwood” is the name given to wood:

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

In secondary tissues, the cells of the axial system are oriented vertically & the radial system is oriented horizontally

Which of the following statements about secondary growth is false?

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

Bark may contain primary tissues as well as secondary tissues.

Hardwood is another name for angiosperm wood.

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

As the vascular cambium continues to divide, the cambial cells:

The cortex of the stem is usually sloughed during the first year of growth.

Earlywood is denser than latewood.

All the periderms make up the outer bark.

In many woody roots & stems, only the 2-dary phloem in the current growth ring is active in long-distance food transport

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

How many rings of vascular cambium would be found in a tree that is 6 years old?

Wood contains mostly:

Growing seasons with favorable environ. conditions make narrower growth rings than seasons with unfavorable conditions.

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

Which of the following could never be part of the bark?

Which of the following statements about secondary growth is false?

The periderm consists of:

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

Primary phloem would not normally be part of the bark.

In angiosperms, early wood ______ than late wood.

In secondary tissues, the axial system consists of ______ cells and the radial system consists of ______ cells.

Which of the following statements about vascular rays is false?

Interfascicular cambium arises:

Which of the following is/are dead at maturity?

The cells that comprise the vascular cambium are the ___________ and the ______________.

Woody perennials usually keep growing during unfavorable seasons.

Fascicular cambium arises from procambium immediately outside the vascular bundles.

Order of tissues in the periderm, from the center of the plant toward the outside, is cork, cork cambium & phelloderm.