Multiple Choice
If you wanted to plant a flowering plant in your yard that would bloom every spring, which of the following should you choose?
33. Plant Anatomy
Growth
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Some plants grow by primary and secondary mechanisms. Choose the correct description of a mechanism and its result.
A
Primary growth increases the diameter of the plant.
B
Stems that only experience primary growth are called woody plants.
C
Herbaceous plants have stems that exhibit only secondary growth.
D
Secondary growth, a feature of herbaceous plants, extends the length of the plant.
E
Primary and secondary growth are required to produce woody plants.
Verified step by step guidance1
Understand the definitions of primary and secondary growth in plants. Primary growth refers to the increase in length of the plant, occurring at the apical meristems. Secondary growth refers to the increase in thickness or girth, occurring at the lateral meristems.
Identify the characteristics of woody plants. Woody plants undergo both primary and secondary growth, allowing them to increase in both length and diameter.
Recognize the characteristics of herbaceous plants. Herbaceous plants typically exhibit only primary growth, meaning they do not develop the thick, woody stems associated with secondary growth.
Evaluate the statements given in the problem. Primary growth does not increase the diameter of the plant; it increases length. Secondary growth increases diameter, not length.
Conclude that the correct description of the mechanism and its result is that both primary and secondary growth are required to produce woody plants, as they need to grow in both length and diameter.
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