Stimulus and Response

Front

What is the definition of tropism?

Back

Tropism is the growth or movement of a plant in response to an environmental stimulus.

Front

What is negative gravitropism?

Back

Negative gravitropism is the growth of plant parts away from the force of gravity, typically seen in stems.

Front

What is positive gravitropism?

Back

Positive gravitropism is the growth of plant parts towards the force of gravity, typically seen in roots.

Front

What is thigmotropism?

Back

Thigmotropism is the directional growth of a plant in response to touch or physical contact.

Front

What is positive thigmotropism?

Back

Positive thigmotropism is the growth of a plant towards a touch stimulus, such as a support structure.

Front

What is the difference between internal and external stimuli?

Back

Internal stimuli originate from within an organism (e.g., hunger), while external stimuli come from the environment (e.g., temperature changes).

Front

What is an example of an internal stimulus?

Back

Feeling hungry is an example of an internal stimulus.

Front

What is an example of an external stimulus?

Back

Cold temperature is an example of an external stimulus.

Front

How do roots respond to gravity?

Back

Roots exhibit positive gravitropism by growing downwards towards the force of gravity.

Front

What is the role of stimuli in plant growth?

Back

Stimuli influence the direction and rate of plant growth through tropisms.