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Biology
Homeostasis and Response
Plant hormones
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Created by
Daniyal Zaman
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Cards (12)
What is the process called when plant shoots grow towards light?
Phototropism
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What do scientists believe controls phototropism in plants?
Plant
hormones
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What is the name of the hormone produced at the tips of shoots?
Auxin
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What happens to shoots when their tips are removed?
They do not
grow
towards
the
light
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What effect does covering the tips of shoots with foil have?
They do
not
grow
towards
the
light
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What does covering the lower parts of shoots with foil indicate?
Lower parts are not sensitive to
light
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How do auxins help shoots grow towards light?
Auxins produced at the tip
Concentrate on the darker side
Cells on darker side grow faster
Causes
shoot to bend towards light
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What is the term for plant roots growing towards gravity?
Gravitropism
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How do auxins behave in roots under gravity?
They inhibit
cell growth
on the lower side
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What are the roles of gibberellins and ethylene in plants?
Gibberellins
: Start seed
germination
Ethylene: Controls
cell division
and
fruit ripening
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What should higher-tier students know about plant hormones?
Gibberellins
and
ethylene
roles
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Why is it important to learn about plant hormones for exams?
They are frequently
tested
topics
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