Is where a plant's stems increase in thickness, while is where a plant's tips and shoots grow.
is a plant's tendency to grow toward a light source, while
is a plant's response to touch, and
5.
is a plant's response to the force of gravity.
Review Key Questions
Provide evidence and details to support your answers.
6. What are the principal organs of plants and what three types of tissue do they contain?
Organs.