Co-ordination and Response in Flowering Plants Flashcards
1
Q
True or False: Plants respond to stimuli
A
True
2
Q
Give two examples of plants responding to stimuli
A
Plants need to be able to grow in response to light to ensure the leaves can absorb light for photosynthesis
Plants also need to be able to grow in response to gravity, to ensure roots grow downwards and stems grow upwards
3
Q
What is the term used to describe a directional growth response to light?
A
Phototrophism
4
Q
What is the term used to describe a directional growth response to gravity?
A
Geotrophism or gravitrophism
5
Q
What are auxins?
A
plant growth regulators (plant hormones)
6
Q
describe the effect of auxins in the shoots
A
they promote cell elongation
7
Q
describe the effects of auxins in the roots
A
They inhibit cell elongation
