Plant Movement

What term is used to describe any factor which causes some sort of change in an organism's body or behaviour?

• growth

• stimulus

• response

• movement

A plant's stem grows towards the source of light to it's left. This is known as

• phototropism

• negative phototropism

• positive phototropism

• neutral phototropism

An example of part movement in plants is

• folding of leaves

• germination

• hydrotropism

• Both A and B

Three stimuli to which plants respond are

• water, smell and light

• light, touch and smell

• light, water and touch

• temperature, water and growth

Plants are known as producers. What stimuli is a main contributor for this being true?

• light

• touch

• temperature

• water

Explain how roots and shoots of plants respond differently to gravity.

How is a plant likely to respond to the following stimuli:

i. light from the left-hand side only

ii. water in the upper layers of the soil

Does it matter which way up a seed or bulb is planted? Explain Why.

The Biology students of ITSS want to investigate how gravity affect plant roots. One of the steps in the method instructs them to place the seedlings in a shaded place.

Explain why placing the seedlings in a shaded place will benefit the students.

Your grandmother complains that the houseplants she grows on the bookshelf at the back of her sitting room, opposite the window, are all falling over and growing at an angle.

a. Explain to her why this is happening.

b. Suggest TWO things she could do to make the plant

grow more upright.