Environmental Stimuli
What is Stimuli?
Any change in an organism's environment that causes a change in behavior.
What is phototropism?
The growth of a plant towards or away from light.
What is thigmotropism?
The positive or negative response of a plant to touch.
What is are flowering plants?
When do long-day plants typically flower?
Typically during mid-summer.
What is tropism?
A response that results in plant growth toward or away from a stimulus.
What are photoreceptors?
Chemicals in a plant that allow it to detect light.
What are tendrils?
Structures on plants that allow them to wrap around or cling to objects.
What is photoperiodism?
A plant's response to the number of hours of darkness in its environment.
When do short day plants typically flower?
Typically during late summer/early fall.
What is positive tropism?
Growth toward a stimulus.
What is positive phototropism?
Leaves and stems growing towards the light.
What is positive thigmotropism?
Vines wrapping around objects.
What are the three types of photoperiodism?
Long-day, Short-day, and day-neutral
What are day-neutral plants?
What is negative tropism?
Growth away from a stimulus.
What is negative phototropism?
What is negative thigmotropism?
roots- grow away from objects t give them the easiest path to soil.
What are long-day plants?
Plants that flower when exposed to less than 10-12 hours of darkness.
What is an example of long-day plants?
Carnations
What are the potential Stimuli?
Light, touch, and gravity.
How might a trees growth look different outside than it might inside?
Is roots growing around a rock positive or negative?
Negative
What are short-day plants?
Plants that need 12 or more hours of darkness in order to begin flowering.
What is an example of short-day plants?
Poinsettias