Science Plants 6.2
Terms in this set (15)
Any change in an organism's environment that causes a response.
A response that results in plant growth toward or away from a stimulus.
The growth of a plant toward or away from light. (Environmental)
The response of a plant to touch (Environmental)
The response of a plant to gravity (Environmental)
A plant's response to the number of hours of darkness in its environment (Environmental)
Special structures that respond to touch
Long Day Plants
Plants that flower when exposed to less than 10-12 hours of darkness
Short Day Plants
Require 12 or more hours of darkness for flowering to begin
Day Neutral Plants
Flower when they reach maturity and the environmental conditions are right
Substances that act as chemical messengers within plants.
A plant hormone that causes increased plant growth and is responsible for phototropism (Chemical)
A gas that can be produced by fruits, seeds, flowers, and leaves (Chemical)
Hormones that increase the rate of cell division and in some plants, slow the aging process of flowers and fruits. (Chemical)
Hormones that increase the rate of cell division and cell elongation (Chemical)