Plant Responces To Stimuli Flashcards
Plants respond to their ________ and ________ environments
1) Internal
2) external
Stimuli
Anything that imitates a response or an action
Example of external:
Light, heat, moisture
Example of Internal:
Water and nutrition levels
Tropism
The way a plant responds to a stimulus
Gravitropism
Plants response to gravity (roots)
Thigmotropism
Plants response to touch (vine on a tree)
Hydrotropism
Plants response to water
Phototropism
Plants response to light (sun)
Rapid movements
Plant responses that are rapid (Venus flytrap)
Auxins
Stimulate cells to elongate (grow) and new roots to grow
(Tall and skinny)
Auxins are produced in the______ ________ and _______ to the rest of the plant
1) apical meristem
2) travel
Auxins cause ____ formation (down) and tips of _____ to grow (up)
1) root
2) stem
Cytokinins
Stunts plant growth and causes plant to be short and fat
Cytokinins produced in growing ____ tips and in developing ______ and _____
1) root
2) fruit
3) seeds