Tropism

Which statement about plant stems is correct?

• They are positively phototropic and positively geotropic

• They are negatively phototropic but positively geotropic

• They are positively phototropic but negatively geotropic

What is a phototropism?

• A response to light

• A response to gravity

• A response to temperature

What is an example of gravitropism?

• a chemical messenger produced by a plant

• the growth of a plant root towards the centre of the Earth

• the growth of a plant shoot towards light

Which processes are used by root hairs to take up ions and water?

• active transport and osmosis

• diffusion and active transport

• osmosis and diffusion

How do carbon dioxide and oxygen move into and out of a mesophyll cell?

• Transpiration

• diffusion

• active transport

Tags

NGSS.MS-LS1-6

The diagram shows a plant cell.

What type of plant cell is this?

• guard cells

• mesophyll cells

• root hair cell

Tags

NGSS.MS-LS1-2

When a plant grows in response to a stimulus, it is referred to as

• photosynthesis

• transpiration

• tropism

If a plant grows toward a light source, then it is said to be displaying ____________?

• negative geotropism

• positive phototropism

• negative phototropism

What part of the plant responds positively to gravity?

• roots

• xylem

• leaves

tropism is described as

• gradual response

• immediate response

• reflex