Positive or negative plant response to an external stimulus such as touch, light , or gravity.

Plant that generally requires short nights- less than 10-12 hours of darkness to being the flowering process.

Plants that need 12 or more hours of darkness to flower.

Plant that doesn't require a specific photoperiod and can

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science

Term	Definition
Tropism	Positive or negative plant response to an external stimulus such as touch, light , or gravity.
Phototropism	A positive response to light
Long-day plant	Plant that generally requires short nights- less than 10-12 hours of darkness to being the flowering process.
Short-day plant	Plants that need 12 or more hours of darkness to flower.
Day-neutral plant	Plant that doesn't require a specific photoperiod and can
Photoperiodism
Auxin