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Flashcards in plant hormones Deck (9)
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1
Q

what is a tropism

A

a tropism is a plants response to a stimulus

2
Q

what is a positive tropism

A

it is when the plant grows towards the stimulus.

3
Q

what is positive phototropism

A

when plant shoots grow towards light.

4
Q

what is positive gravitropism (geotropism)

A

it is when plants grow downwards- towards the pull of gravity

5
Q

what are plant hormones

A

plant hormones are chemicals that cause changes in plants

6
Q

what do auxins do

A

they make cells grow longer

7
Q

what do gibberellins do

A

they make plant shoots grow longer. they also also control when seeds germinate

8
Q

what are auxins affected by and what do they cause

A

they are affected by light and cause phototropism in shoots.

9
Q

describe how auxin affects a plant

A

auxin is produced in cells near the top of a shoot, auxins move to shaded part of shoot, auxins cause cell elongation on the dark side of the shoot. the light side of the shoot is closest to light