Question 1

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

Accepted Answer

A)   simple, straight
B)   taproot
C)   fibrous
D)   secondary
E)   aerialF) A) and D)
G) B) and E)

Question 2

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.F) B) and E)
G) B) and D)

Question 3

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.F) A) and B)
G) A) and C)

Question 4

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.F) B) and D)
G) B) and C)

Question 5

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.F) C) and D)
G) A) and C)

Question 6

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 correctF) B) and C)
G) A) and B)

Question 7

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.F) B) and E)
G) All of the above

Question 8

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

Accepted Answer

A)   xylem
B)   phloem
C)   epidermis
D)   cortex
E)   nodesF) B) and E)
G) A) and B)

Question 9

Which of the following cells is relatively thin-walled?

Accepted Answer

A)   stone cell
B)   fiber
C)   tracheid
D)   vessel element
E)   passage cellF) None of the above
G) A) and D)

Question 10

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 11

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

Accepted Answer

A) True 
 B)False

Question 12

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 correctF) B) and C)
G) All of the above

Question 13

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.F) A) and C)
G) All of the above

Question 14

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.F) C) and D)
G) B) and D)

Question 15

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.F) A) and D)
G) D) and E)

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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.F) A) and B)
G) A) and C)

Question 19

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.F) C) and D)
G) A) and E)

Question 20

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.F) None of the above
G) A) and E)

Exam 5: Roots and Soils

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

Correct AnswerverifiedShow Answer

Which soil horizon is the most important agriculturally?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A unique feature of the pericycle is

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

How does monocot root structure differ from dicot root structure?

Correct AnswerverifiedShow Answer

Which of the following cells is relatively thin-walled?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A root system may function in which of the following?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Mycorrhizae roots are those that

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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