Question 1

The protective suberin bands called Casparian strips are confined to the cells of the epidermis.

Accepted Answer

A) True 
 B)False

Question 2

Plant root systems can detect and respond to gravity within 30 minutes to a few hours.

Accepted Answer

A) True 
 B)False

Question 3

Monocots, such as grasses, usually have __________ root systems.

Accepted Answer

A)  simple, straight 
B)  taproot 
C)  fibrous 
D)  secondary 
E)  aerial 
A)  simple, straight 
B)  taproot 
C)  fibrous 
D)  secondary 
E)  aerial

Question 4

Which of the following cells is relatively thin-walled?

Accepted Answer

A)  stone cell 
B)  fiber 
C)  tracheid 
D)  vessel element 
E)  passage cell 
A)  stone cell 
B)  fiber 
C)  tracheid 
D)  vessel element 
E)  passage cell

Question 5

The tissue adjacent to the endodermis toward the center of a root is the

Accepted Answer

A)  cortex. 
B)  pith. 
C)  pericycle. 
D)  xylem. 
E)  phloem. 
A)  cortex. 
B)  pith. 
C)  pericycle. 
D)  xylem. 
E)  phloem.

Question 6

Clay particles have negative electric charge which tend to retard water drainage and retain positively charged ions.

Accepted Answer

A) True 
 B)False

Question 7

Specialized roots that permit aquatic plants to facilitate gas exchange are called

Accepted Answer

A)  velamen roots. 
B)  water-storage roots. 
C)  buttress roots. 
D)  pneumatophores. 
E)  prop roots. 
A)  velamen roots. 
B)  water-storage roots. 
C)  buttress roots. 
D)  pneumatophores. 
E)  prop roots.

Question 8

In traversing the root to the central xylem vessels, the last living tissue that water passes through before entering the xylem is the

Accepted Answer

A)  endodermis. 
B)  pericycle. 
C)  cortex. 
D)  phloem. 
E)  epidermis. 
A)  endodermis. 
B)  pericycle. 
C)  cortex. 
D)  phloem. 
E)  epidermis.

Question 9

How does monocot root structure differ from dicot root structure?

Accepted Answer

A)  Monocot endodermis cells lack a Casparian strip. 
B)  Dicot roots lack a central pith region. 
C)  Monocot roots usually form a tap root system. 
D)  Dicot roots do not form branch roots. 
E)  There is no structural difference between monocot and dicot root systems. 
A)  Monocot endodermis cells lack a Casparian strip. 
B)  Dicot roots lack a central pith region. 
C)  Monocot roots usually form a tap root system. 
D)  Dicot roots do not form branch roots. 
E)  There is no structural difference between monocot and dicot root systems.

Question 10

Which of the following is/are absent in dicot roots?

Accepted Answer

A)  xylem 
B)  phloem 
C)  epidermis 
D)  cortex 
E)  nodes 
A)  xylem 
B)  phloem 
C)  epidermis 
D)  cortex 
E)  nodes

Question 11

Mycorrhizae roots are those that

Accepted Answer

A)  have a symbiotic association with fungi. 
B)  have a symbiotic association with nitrogen fixing bacteria. 
C)  contain hyphae of parasitic fungi. 
D)  are above ground roots that serve to support the stem. 
E)  are propagative roots. 
A)  have a symbiotic association with fungi. 
B)  have a symbiotic association with nitrogen fixing bacteria. 
C)  contain hyphae of parasitic fungi. 
D)  are above ground roots that serve to support the stem. 
E)  are propagative roots.

Question 12

A root system may function in which of the following?

Accepted Answer

A)  Anchorage and storage. 
B)  Growth. 
C)  Absorption and conduction. 
D)  Production of new roots. 
E)  All of the answers are correct. 
A)  Anchorage and storage. 
B)  Growth. 
C)  Absorption and conduction. 
D)  Production of new roots. 
E)  All of the answers are correct.

Question 13

The rootlike projections of parasitic plants that develop along their stems and penetrate the host plants' tissues are called

Accepted Answer

A)  parenchyma. 
B)  mycorrhizae. 
C)  haustoria. 
D)  mutualistic. 
E)  aerial roots. 
A)  parenchyma. 
B)  mycorrhizae. 
C)  haustoria. 
D)  mutualistic. 
E)  aerial roots.

Question 14

The vascular tissue of a new lateral (branch)root connects with the vascular tissue of the older root for continuous conduction of water and minerals.

Accepted Answer

A) True 
 B)False

Question 15

Which soil horizon is the most important agriculturally?

Accepted Answer

A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  D horizon 
E)  both [B horizon and C horizon] are correct 
A)  A horizon 
B)  B horizon 
C)  C horizon 
D)  D horizon 
E)  both [B horizon and C horizon] are correct

Question 16

A unique feature of the pericycle is

Accepted Answer

A)  its retention of meristematic potential. 
B)  the production of lateral roots. 
C)  the presence of a Casparian strip. 
D)  its location next to the epidermis. 
E)  both [its retention of meristematic potential and the production of lateral roots] are correct 
A)  its retention of meristematic potential. 
B)  the production of lateral roots. 
C)  the presence of a Casparian strip. 
D)  its location next to the epidermis. 
E)  both [its retention of meristematic potential and the production of lateral roots] are correct

Question 17

Roots that develop from an organ OTHER than an existing root are called

Accepted Answer

A)  root hairs. 
B)  fibrous roots. 
C)  radicle. 
D)  adventitious roots. 
E)  primary root. 
A)  root hairs. 
B)  fibrous roots. 
C)  radicle. 
D)  adventitious roots. 
E)  primary root.

Question 18

Stored food, especially starch and other carbohydrates in storage roots, can be found in this tissue of a root

Accepted Answer

A)  endodermis. 
B)  epidermis. 
C)  pericycle. 
D)  cortex. 
E)  cork. 
A)  endodermis. 
B)  epidermis. 
C)  pericycle. 
D)  cortex. 
E)  cork.

Question 19

Root hairs are found in the region of the root called the

Accepted Answer

A)  root cap. 
B)  apical meristem. 
C)  region of elongation. 
D)  region of maturation. 
E)  endodermis. 
A)  root cap. 
B)  apical meristem. 
C)  region of elongation. 
D)  region of maturation. 
E)  endodermis.

Question 20

Soil water between field capacity and the permanent wilting point is called

Accepted Answer

A)  hygroscopic water. 
B)  gravitational water. 
C)  capillary water. 
D)  intermediate water. 
E)  available water. 
A)  hygroscopic water. 
B)  gravitational water. 
C)  capillary water. 
D)  intermediate water. 
E)  available water.

Exam 5: Roots and Soils

The protective suberin bands called Casparian strips are confined to the cells of the epidermis.

Plant root systems can detect and respond to gravity within 30 minutes to a few hours.

Monocots, such as grasses, usually have __________ root systems.

Which of the following cells is relatively thin-walled?

The tissue adjacent to the endodermis toward the center of a root is the

Clay particles have negative electric charge which tend to retard water drainage and retain positively charged ions.

Specialized roots that permit aquatic plants to facilitate gas exchange are called

In traversing the root to the central xylem vessels, the last living tissue that water passes through before entering the xylem is the

How does monocot root structure differ from dicot root structure?

Which of the following is/are absent in dicot roots?

Mycorrhizae roots are those that

A root system may function in which of the following?

The rootlike projections of parasitic plants that develop along their stems and penetrate the host plants' tissues are called

The vascular tissue of a new lateral (branch)root connects with the vascular tissue of the older root for continuous conduction of water and minerals.

Which soil horizon is the most important agriculturally?

A unique feature of the pericycle is

Roots that develop from an organ OTHER than an existing root are called

Stored food, especially starch and other carbohydrates in storage roots, can be found in this tissue of a root

Root hairs are found in the region of the root called the

Soil water between field capacity and the permanent wilting point is called

What Is Plant Biology

The Nature of Life

Cells

Tissues

Stems

Leaves

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Genetics

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdombacteria, Domain King-Domarchaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants: Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

Biomes

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