B3 - Rhythms and Plant defences

  • Created by: ldupre03
  • Created on: 24-04-17 19:49
What are most plant and animal responses controlled by?
rhythms
1 of 14
Define Photoperiodicity (photoperiodism)
the response of a plant that changes as day length changes
2 of 14
what is the scientific name for a pattern of behaviour that changes over a 24hour period
Circadian rhythm
3 of 14
what are circadian rhythms controlled by?
an internal biological clock
4 of 14
what does 'Circadian' come from? (the latin word for...)
Circa = about, and dies = a day
5 of 14
over how many hours does a circadian rhythm show the same pattern?
24 hours
6 of 14
how do plants protect themselves from attack?
producing chemicals
7 of 14
plants producing chemicals that kill pathogens will do what?
infect and cause disease
8 of 14
how do plants deter pests that try to eat them?
make poisons in cells
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which plant source can be used to treat humans e.g. malaria (by chemicals produced)?
quinine - a cinchona tree
10 of 14
which plant source can be used to treat human disorders e.g. heart disorders (by chemicals produced)?
digoxin - a foxglove
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which plant source can be used to relieve symptoms e.g. pain and fever (by chemicals produced)?
aspirin - a willow tree and other plants
12 of 14
pathogens and pests attack crop plants and cause damage. This reduces the what of the crop?
The yield
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what is the yield?
amount of food we can get from the crop
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Other cards in this set

Card 2

Front

Define Photoperiodicity (photoperiodism)

Back

the response of a plant that changes as day length changes

Card 3

Front

what is the scientific name for a pattern of behaviour that changes over a 24hour period

Back

Preview of the front of card 3

Card 4

Front

what are circadian rhythms controlled by?

Back

Preview of the front of card 4

Card 5

Front

what does 'Circadian' come from? (the latin word for...)

Back

Preview of the front of card 5
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