Plants Do Not Have a Circulatory System Like That of Some

question 20

Multiple Choice

Plants do not have a circulatory system like that of some animals. If a water molecule did "circulate" (that is, go from one point in a plant to another and back in the same day) , it would require the activity of

• A) only the xylem.
• B) only the phloem.
• C) only the endodermis.
• D) both the xylem and the phloem.

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Definitions:

Organic Compounds

Chemical compounds that contain carbon-hydrogen bonds, including a wide range of substances such as fuels, plastics, food additives, and drugs.

Proteins

Large, complex molecules made of amino acids that perform a vast array of functions in living organisms, including structural, enzymatic, and regulatory roles.

Polysaccharide

Polymer made from carbohydrate monomers; the polysaccharides starch and glycogen are polymers of glucose monomers.

Cellulose

A complex carbohydrate or polysaccharide consisting of glucose units, forming the primary structural component of plant cell walls.