Match each of the following terms with its meaning. a....

Match each of the following terms with its meaning.
a. gravitropism
b. photoperiodism
c. phototropism
d. thigmotropism
1. growth response to light
2 growth response to touch
3. growth response to day length or night length
4. growth response to gravity

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Key Concepts

Gravitropism

Gravitropism refers to the directional growth response of an organism to gravity. In plants, it involves the reorientation of growth to ensure that roots grow downward, toward gravity, while shoots grow upward, away from gravity, which is essential for proper anchorage and access to light.

Photoperiodism

Photoperiodism is the biological response to the relative lengths of day and night. This concept is critical in controlling the timing of flowering and other developmental processes in plants, as organisms gauge seasonal changes through the duration of light exposure in a day.

Phototropism

Phototropism is the growth response of an organism to light. In plants, this involves the bending or turning of plant parts towards a light source, optimizing light capture for photosynthesis and ensuring effective energy production.

Thigmotropism

Thigmotropism is the directional growth response to touch or physical contact. It is commonly seen in climbing plants and vines, where contact with a support structure triggers growth adjustments that help in securing physical stability and support.

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