Question

question 1
match each type of tropism (column a - question) with the correct stimulus and plant response (column b - answer).
each answer may be used once, more than once, or not at all.
make like a plant and bloom!
column a

1. phototropism

2 gravitropism (geotropism)
3 thigmotropism

1. hydrotropism

column b
a: a plant stem bending toward sunlight
b. roots growing toward higher water concentration in soil
c. a vine wrapping around a fence post
d. the leaves of a plant dropping in the fall
e. roots growing downward into the soil due to gravity

Explanation:

• Phototropism is the growth of a plant in response to light. A plant stem bending toward sunlight (a) is an example of phototropism.
• Gravitropism (Geotropism) is the growth of a plant in response to gravity. Roots growing downward into the soil due to gravity (e) is an example of gravitropism.
• Thigmotropism is the growth of a plant in response to touch. A vine wrapping around a fence post (c) is an example of thigmotropism.
• Hydrotropism is the growth of a plant in response to water. Roots growing toward higher water concentration in soil (b) is an example of hydrotropism. The leaves of a plant dropping in the Fall (d) is not a tropism.

Answer:

1. a
2. e
3. c
4. b