Which of These Was Commonly Cultivated in the Earliest American

question 35

Multiple Choice

Which of these was commonly cultivated in the earliest American cultures?

• A) barley
• B) rice
• C) maize
• D) wheat

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Definitions:

Active Transport

The movement of substances across cell membranes against a concentration gradient, requiring energy.

Passive Transport

The movement of ions and other molecular substances across cell membranes without the need for energy input.

Sieve Elements

Specialized cells in the phloem of vascular plants that are involved in the transport of sugars and nutrients.

Sink Cells

Cells that act as a metabolic or storage sink, usually absorbing and storing nutrients transported from source cells in an organism.