Chapter 21

Question 1

Other plant families besides the grass and legume families can have crops of economic importance.

Answer 1

True

Question 2

Potatoes grow best in heavy clay soils.

Answer 2

True

Question 3

Tobacco crops are generally not allowed to flower and produce seed.

Answer 3

True

Question 4

The use of tobacco in its many forms can cause health problems such as lung cancer, heart disease, emphysema, and mouth cancers.

Answer 4

True

Question 5

Sweet potatoes can be grown as perennials in tropical areas.

Answer 5

True

Question 6

True yams have modified roots like sweet potatoes.

Answer 6

False

Question 7

Sugar beets contain 50 percent sugar at harvest.

Answer 7

False

Question 8

Sugar cane is the source of 50 percent of the world production of sugar.

Answer 8

True

Question 9

The fiber from cotton is always white.

Answer 9

False

Question 10

Russian scientists were responsible for breeding large heads and high seed production in sunflowers.

Answer 10

True

Question 11

Tobacco growers take actions to promote flowering when growing tobacco.

Answer 11

False

Question 12

Opium poppy is a source or legal and illegal drugs.

Answer 12

True

Question 13

White potatoes originated in:

A. Europe
B. Asia
C. North America
D. South America

Answer 13

D. South America

Question 14

Which of the following crops is NOT in the nightshade family?

A. sweet potato
B. white potato
C. tobacco
D. tomato

Answer 14

A. sweet potato

Question 15

The leading producer of sweet potatoes is:

A. Asia
B. North America
C. South America
D. Africa

Answer 15

A. Asia

Question 16

Tapioca is made of:

A. true yams
B. turnip
C. Jerusalem artichoke
D. cassava

Answer 16

D. cassava

Question 17

Which of the following is native of North America?

A. true yams
B. turnip
C. Jerusalem artichoke
D. cassava

Answer 17

C. Jerusalem artichoke

Question 18

Taro is grown for which plant part?

A. leaves
B. corms
C. seeds
D. tubers

Answer 18

B. corms

Question 19

Cassava is which of the following?

A. cool season annual
B. perennial woody shrub
C. warm season annual
D. herbaceous perennial

Answer 19

B. perennial woody shrub

Question 20

Seeds are produced in sugar beet in the:

A. first year
B. second year
C. third year
D. fourth year

Answer 20

B. second year

Question 21

Plantains are which type of crop?

A. sugar crop
B. oil crop
C. grain crop
D. starch crop

Answer 21

D. starch crop

Question 22

Opium poppy is grown for which plant parts?

A. sap and seeds
B. sap, seeds, and roots
C. seeds only
D. sap only

Answer 22

D. sap only

Question 23

Sugar cane is native to which of the following regions?

A. the Caribbean
B. the South Pacific and India
C. China
D. South America

Answer 23

B. the South Pacific and India

Question 24

The leading fiber crop in the world is:

A. flax
B. cotton
C. hemp
D. sisal

Answer 24

B. cotton

Question 25

Where are the fibers of the cotton found? A. in the stem B. in the leaves C. attached to the roots D. attached to the seeds

Answer 25

D. attached to the seeds

Question 26

Where are the fibers of flax found? A. in the stem B. in the leaves C. attached to the roots D. attched to the seeds

Answer 26

A. in the stem

Question 27

The cloth produced from flax is: A. polyester B. linen C. satin D. canvas

Answer 27

B. linen

Question 28

Flax is which of the following? A. cool season annual B. cool season perennial C. warm season annual D. warm season perennial

Answer 28

C. warm season annual

Question 29

Which of the following is NOT used as a fiber crop? A. flax B. cotton C. hemp D. sunflower

Answer 29

D. sunflower

Question 30

Which of the following is not an oil crop? A. cotton B. canola C. safflower D. none of these answers is correct

Answer 30

D. none of these answers is correct

Question 31

Canola is which of the following? A. cool season annual B. cool season perennial C. warm season annual D. warm season perennial

Answer 31

A. cool season annual