Tropisms

Phototropism is response to the stimulus of

• Light

• Water

• Gravity

Geotropism is response to the stimulus of

• light

• gravity

• water

When a response is positive it

• grows away from the stimulus

• grows towards the stimulus

The apparatus used to study tropisms is called

• potometer

• clinostat

• microscope

When auxin is exposed to light from one side

• remains in the direction of light

• moves away from the light

• it will be equally spread all across the stem

Auxin induces growth by

• making cells at the tip elongate

• making cells under the tip elongate

Tags

NGSS.MS-LS1-5

Auxin in roots

• increases growth and elongation

• decreases growth and elongation

Tags

NGSS.MS-LS1-5

To prevent a shoot from growing further upwards

• it is best to cut off all leaves

• it is best to cut off lateral buds

• it is best to cut off the tip of the shoot

• it is best to cut off the whole stem

In a rotating clinostat, radicles will

• grow towards the stimulus of gravity

• grow towards the light

• grow straight and horizontally out

Successful pollination in flowers is due to

• phototropism

• geotropism

• hydrotropism