Understanding Stimulus and Response in Living Organisms

The video tutorial explains how living organisms respond to stimuli in their environment. It defines stimulus as a change affecting an organism's activity and response as the reaction to this change. Examples include the touch-me-not plant folding its leaves when touched and plants bending towards light, demonstrating phototropism.

What is a stimulus in the context of living organisms?

• A reaction to a change

• A change in the environment affecting an organism

• A type of plant

• A type of animal behavior

How does a touch-me-not plant respond when touched?

• It folds its leaves

• It grows taller

• It changes color

• It produces flowers

Why is the touch-me-not plant named so?

• Because it is sensitive to light

• Because it folds its leaves when touched

• Because it grows rapidly

• Because it changes color when touched

What happens to a potted plant placed near a window with sunlight?

• It stops growing

• It loses its leaves

• It bends towards the window

• It wilts

What is the term for a plant's growth response towards light?

• Photosynthesis

• Phototropism

• Photophobia

• Photolysis