Chapter 21 Flashcards
Other plant families besides the grass and legume families can have crops of economic importance.
True
Potatoes grow best in heavy clay soils.
True
Tobacco crops are generally not allowed to flower and produce seed.
True
The use of tobacco in its many forms can cause health problems such as lung cancer, heart disease, emphysema, and mouth cancers.
True
Sweet potatoes can be grown as perennials in tropical areas.
True
True yams have modified roots like sweet potatoes.
False
Sugar beets contain 50 percent sugar at harvest.
False
Sugar cane is the source of 50 percent of the world production of sugar.
True
The fiber from cotton is always white.
False
Russian scientists were responsible for breeding large heads and high seed production in sunflowers.
True
Tobacco growers take actions to promote flowering when growing tobacco.
False
Opium poppy is a source or legal and illegal drugs.
True
White potatoes originated in:
A. Europe
B. Asia
C. North America
D. South America
D. South America
Which of the following crops is NOT in the nightshade family?
A. sweet potato
B. white potato
C. tobacco
D. tomato
A. sweet potato
The leading producer of sweet potatoes is:
A. Asia
B. North America
C. South America
D. Africa
A. Asia
