Phototropisms Flashcards
1
Q
What is the aim of the investigation?
A
- Show how plant shoots respond to light
2
Q
How are the plants prepared?
A
- Place nine (wheat) shoots in individual pots with the same soil
- shoots should be rougly the same height
- cover tips of 3 shoots with foil cap
- 3 shoots without foil
- 3 shoots wrapped with foil around the base, leaving onl tip exposes
3
Q
How is the experiment carried out with the plants prepared?
A
- place a light source in front of them and leave them for a few days
- same distance from source
- same intensity
4
Q
What is controlled?
A
- intensity of light
- temp
- moisture
- soil type
5
Q
What is recorded?
A
- exposed tips ggrow towards light source
- amount of growth and direction
6
Q
How is geotropism investigated?
A
- petri dish with moist cotton woll
- cress seeds
- wrap in foil
- prop different petri dishes at different angles
- measure amount of growth and angle
