Main Idea Details
234 Plant Structure and Function
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Compare tropism and nastic movement. Place each characteristic
in the correct location in the Venn diagram below.
- does not involve growth • is reversible
- involves growth • is not reversible
- involves plant response • response can be positive or negative
Section 22.3 Plant Hormones and Responses (continued)
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Classify each of the following as an example of tropism or nastic
movement.
Venus flytrap closes on an insect.
Sweet pea tendrils climb a fence.
Plant grows toward a lamp.
Mimosa pudica leaflets become limp when
touched.
Plant roots grow into the soil.
Farmers often use hormones to improve their crop yield. Describe
a hormone that a farmer might use and how the hormone can help increase crop output.
(^) CONNECT
Tropism Nastic
Both Movement