Biology 425: True-False Questions- Chapters 26-30
1. Annuals, Biennials, and Perennials; p. 581; easy; ans: T
An annual completes its entire life cycle within one growing season.
2. The Vascular Cambium; p. 581; moderate; ans: T
The meristematic cells of the vascular cambium are the fusiform initials and the ray initials.
3. The Vascular Cambium; p. 582; moderate; ans: T
In secondary tissues, the cells of the axial system are oriented vertically and those of the radial
system are oriented horizontally.
4. The Vascular Cambium; p. 582; moderate; ans: T
The cambial zone consists of the fusiform initials, the ray initials, and their immediate
derivatives.
5. The Vascular Cambium; p. 583; easy; ans: T
Reactivation of the vascular cambium in the spring is triggered by the expansion of the buds.
6. The Vascular Cambium; p. 583; moderate; ans: T
Unlike plants in temperate regions, many tropical plants exhibit continuous, year-round cambial
activity.
7. Effect of Secondary Growth on the Primary Body of the Stem; p. 583; easy; ans: T
Interfascicular cambium arises in parenchyma cells between the vascular bundles.
8.Effect of Secondary Growth on the Primary Body of the Stem; p. 584; moderate; ans.:F
The secondary plant body has a (no) transition region similar to that of the primary plant body.
9.Effect of Secondary Growth on the Primary Body of the Stem; p. 585; moderate; ans: T
The order of tissues in the periderm, from the outside of the plant toward the center, is phellem,
phellogen, and phelloderm.
10.Effect of Secondary Growth on the Primary Body of the Stem; p. 585; moderate; ans: F
The cortex of the stem is (not) usually sloughed during the first year of growth.
11. Effect of Secondary Growth on the Primary Body of the Stem; p. 586; easy; ans: T
Lenticels make it possible for stems to exchange gases with the surrounding air.
12.Effect of Secondary Growth on the Primary Body of the Stem; p. 587; moderate; ans: T
Bark may contain primary tissues as well as secondary tissues.
, 13.Effect of Secondary Growth on the Primary Body of the Stem; p. 590; moderate; ans: T
The stem of most woody plants contains more than one periderm.
14.Effect of Secondary Growth on the Primary Body of the Stem; p. 591; moderate; ans: F
In the cork oak, the cork produced by the first cork cambium has the greatest (least) commercial
value.
15.Effect of Secondary Growth on the Primary Body of the Stem; p. 591; difficult; ans: F
Nonfunctional phloem is dead phloem tissue found in the inner (outer) bark.
16. Wood: Secondary Xylem; p. 591; easy; ans: T
Hardwood is another name for angiosperm wood.
17. Wood: Secondary Xylem; pp. 591–592; moderate; ans: F
Conifer wood typically contains more (less) parenchyma than angiosperm wood.
18. Wood: Secondary Xylem; p. 592; moderate; ans: T
A radial section and a tangential section are longitudinal sections.
19. Wood: Secondary Xylem; p. 594; moderate; ans: F
The rays of angiosperm woods are usually smaller (larger) than those of conifer woods.
20. Wood: Secondary Xylem; p. 596; easy; ans: F
Growing seasons with favorable environmental conditions produce narrower (wider) growth
rings than seasons with unfavorable conditions.
21. Wood: Secondary Xylem; p. 596; easy; ans: T
Scientists have chronicled a continuous series of growth rings dating back more than 8200 years.
22. Wood: Secondary Xylem; p. 596; difficult; ans: T
In diffuse-porous woods, the pores are fairly uniform in size and distribution throughout the
growth layers.
23. Wood: Secondary Xylem; p. 596; easy; ans: T
The proportion of heartwood to sapwood varies among species.
24. Wood: Secondary Xylem; p. 597; moderate; ans: T
Compression wood is a type of reaction wood found in gymnosperms.
25. Wood: Secondary Xylem; p. 598; moderate; ans: T
1. Annuals, Biennials, and Perennials; p. 581; easy; ans: T
An annual completes its entire life cycle within one growing season.
2. The Vascular Cambium; p. 581; moderate; ans: T
The meristematic cells of the vascular cambium are the fusiform initials and the ray initials.
3. The Vascular Cambium; p. 582; moderate; ans: T
In secondary tissues, the cells of the axial system are oriented vertically and those of the radial
system are oriented horizontally.
4. The Vascular Cambium; p. 582; moderate; ans: T
The cambial zone consists of the fusiform initials, the ray initials, and their immediate
derivatives.
5. The Vascular Cambium; p. 583; easy; ans: T
Reactivation of the vascular cambium in the spring is triggered by the expansion of the buds.
6. The Vascular Cambium; p. 583; moderate; ans: T
Unlike plants in temperate regions, many tropical plants exhibit continuous, year-round cambial
activity.
7. Effect of Secondary Growth on the Primary Body of the Stem; p. 583; easy; ans: T
Interfascicular cambium arises in parenchyma cells between the vascular bundles.
8.Effect of Secondary Growth on the Primary Body of the Stem; p. 584; moderate; ans.:F
The secondary plant body has a (no) transition region similar to that of the primary plant body.
9.Effect of Secondary Growth on the Primary Body of the Stem; p. 585; moderate; ans: T
The order of tissues in the periderm, from the outside of the plant toward the center, is phellem,
phellogen, and phelloderm.
10.Effect of Secondary Growth on the Primary Body of the Stem; p. 585; moderate; ans: F
The cortex of the stem is (not) usually sloughed during the first year of growth.
11. Effect of Secondary Growth on the Primary Body of the Stem; p. 586; easy; ans: T
Lenticels make it possible for stems to exchange gases with the surrounding air.
12.Effect of Secondary Growth on the Primary Body of the Stem; p. 587; moderate; ans: T
Bark may contain primary tissues as well as secondary tissues.
, 13.Effect of Secondary Growth on the Primary Body of the Stem; p. 590; moderate; ans: T
The stem of most woody plants contains more than one periderm.
14.Effect of Secondary Growth on the Primary Body of the Stem; p. 591; moderate; ans: F
In the cork oak, the cork produced by the first cork cambium has the greatest (least) commercial
value.
15.Effect of Secondary Growth on the Primary Body of the Stem; p. 591; difficult; ans: F
Nonfunctional phloem is dead phloem tissue found in the inner (outer) bark.
16. Wood: Secondary Xylem; p. 591; easy; ans: T
Hardwood is another name for angiosperm wood.
17. Wood: Secondary Xylem; pp. 591–592; moderate; ans: F
Conifer wood typically contains more (less) parenchyma than angiosperm wood.
18. Wood: Secondary Xylem; p. 592; moderate; ans: T
A radial section and a tangential section are longitudinal sections.
19. Wood: Secondary Xylem; p. 594; moderate; ans: F
The rays of angiosperm woods are usually smaller (larger) than those of conifer woods.
20. Wood: Secondary Xylem; p. 596; easy; ans: F
Growing seasons with favorable environmental conditions produce narrower (wider) growth
rings than seasons with unfavorable conditions.
21. Wood: Secondary Xylem; p. 596; easy; ans: T
Scientists have chronicled a continuous series of growth rings dating back more than 8200 years.
22. Wood: Secondary Xylem; p. 596; difficult; ans: T
In diffuse-porous woods, the pores are fairly uniform in size and distribution throughout the
growth layers.
23. Wood: Secondary Xylem; p. 596; easy; ans: T
The proportion of heartwood to sapwood varies among species.
24. Wood: Secondary Xylem; p. 597; moderate; ans: T
Compression wood is a type of reaction wood found in gymnosperms.
25. Wood: Secondary Xylem; p. 598; moderate; ans: T
