Plant Responses
A Stimuli is?
is any changes in an organisms environment that causes changes in behavior.
What is Phototropism?
The growth of a plant towards or away from light.
Roots are an example of?
Negative Thigmotropism.
What is Photoperiodism?
A plant's response to the number of hours of darkness in its environment
What are Plant Hormones?
Substances that act as chemical messengers within plants.
Behavior is?
The way a organism reacts go a change in environment.
What is Thigmotropism?
a positive or a negative response of a plant to touch.
What is Gravitropism?
The response of a plant to gravity.
What are long-day plants?
Plants that flower when exposed to less than 10-12 hours of darkness.
What are 4 types of Plant Hormones?
Auxins, Ethylene, Gibberellins, Cytokinins
Tropism is?
A response that results in plant growth toward or away from a stimulus.
Structures on plants that allows to wrap around things.
Roots will grow towards gravity which is?
Positive.
What are Short-day plants?
Plants that need 12 or more hours of darkness in order to begin flowering.
What are Auxins?
Responsible for increased plant growth and play a part in positive phototropism
What are potential Stimuli?
Light, touch, & gravity.
What is an example of Tendrils?
Vines.
Stems grow away from gravity which is?
Negative.
What are Day-neutral plants?
When a plant flowers on it's own time.
What is Ethylene?
A gas that is produced by fruits, seeds, flowers, and leaves.
Growth towards a stimulus =
Positive tropism.
What plant is an example of negative Thigmotropism?
Roots.
If a plant pot is sideways, the roots will?
Follow the gravity.
Example of Long-Day plants, Short-Day plants, and Day-Neutral plants.
Carnations, Poinsettias, Roses.
What is Gibberellins and Cytokinins?
Gibberellins: Present in rapidly growing areas of plants, such as roots and stems. Cytokinins: Increases the rate of cell division and slows the aging process of flowers and fruits