Plant Responses

Describe the changes in plants that hormones are responsible for.

Answer explanation

Plant hormones are responsible for controlling the growth of stems and roots, the ripening of fruit and the direction of growth of the roots

What is the name of the group of hormones responsible for controlling the growth of stems and roots

• aux cord

• auxins

• orksins

• orcas

When light comes from one side, more auxin is found on the side _______ from the light.

Describe how auxin cause plants to grow.

Answer explanation

Auxin moves through the cells away from the light.

The hormone passes downwards until it reaches the cells in the growth region just below the tip. It acts on these cells and makes them

divide and grow in length. Hence, the plant grows taller. The cells in the growing region of the plant are the target cells for auxin. Cells outside this region do not respond to the hormone.

Label the diagram to show where source/direction of sunlight is for both scenarios

Watch the video on teams and record your observations.

Suggest why the plants change the direction of their growth. Include what the stimulus they are responding to.

Research the term "Hydrotropism" then fill in the blanks below:

Hydrotropism is the directional _______ of roots _______ ______.

(separate your answers with a comma)