plant growth substances Flashcards
(7 cards)
1
Q
what is a tropism?
A
the growth of a plant towards a directional stimulus
2
Q
what is a phototropism?
A
growth response to light from one direction
3
Q
what is a positive phototropism?
A
growth towards the light
4
Q
what is auxin and where is it found?
A
auxins build up on shaded side
causes cells on the shaded side to elongate more
as a result the shoot bends towards the light
5
Q
what would happen is plant was exposed to light but tip was covered?
A
grow directly upwards
6
Q
what would happen is plant was exposed to light but it had no tip?
A
no growth
7
Q
what is geotropism?
A
plant grows towards or away from gravity
roots are generally geotropic
