plants

  • Created by: o.addis
  • Created on: 20-04-18 21:29
what four things do you need for photosynthesis?
water, carbon dioxide, chloropyll and sunlight
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what is the word eqaution for photosynthesis?
carbron dioxide + water >>> glucose + oxygen
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how are leaves adapted to photosynthesis?
big surface area for sunlight, most chloroplasts are near the top of the leaf so can get more sunlight, underneath the leaf stomata are found (tiny holes) this is where carbon dioxide diffuses into the leaf from the air
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why do plants need minerals?
plants grow using food they make themselves in photosythesis, but to keep healthy they need mineral nutrients from the soil, they also absorb these minerals through their roots (along with water)
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what is photosynthesis?
it is a chemical reaction that takes place in every green plant, produces food in the form of glucose, they can use the food to the create more biomass (grow), it takes place in all the green bits but mainly the leaves
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what is the function of the stamens?
these are the male parts of the flower, they consist of anther and filament, the anther contains the pollen grains which produce the male sex cells and the filament supports the anther
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what is the function of the carpels?
these are the female parts of the flower they consist of the stigma, style and ovary the ovary contains the female sex cells inside the ovules
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what is the function of the petals?
they are often brightly coloured, this is to attract insects for pollination
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what is the function of the sepals?
these are green and leaf like they protect the flower in the bud they are found in the main petals
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what is pollination?
tomake a seed the male and female sex cells must meet up, to do this the pollen grains must get from a stamen to a stigma, basically to get pollen to the stigma
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what is self pollination?
pollen is transferred from the stamen to the stigma of the same plant
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what is cross pollination?
pollen is transferred from the stamen of one plant to the stigma of a different plant
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what are the two ways cross pollination can take place?
insect pollination and wind pollination
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what are the features that help insect pollination?
bright coloured petals, scented flowers with necraries (glands that produce a sugary liquid for insects to feed on), sticky stigma to take the pollen off the insect
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what are the features that help wind pollination?
small dull petals, no scent or nectaries, long filaments hang on the anthers ont the outside of thre flower so a lot of pollen is blown away, stigmas are feathery to catch pollen as it carried past in the wind
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what is the fertilisation?
it is the joining of sex cells in plants
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how many types of seed dispersal are there?
four
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what are the types of seed dispersal?
wind dispersal, animal dispersal, explosions and drop and roll
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Other cards in this set

Card 2

Front

what is the word eqaution for photosynthesis?

Back

carbron dioxide + water >>> glucose + oxygen

Card 3

Front

how are leaves adapted to photosynthesis?

Back

Preview of the front of card 3

Card 4

Front

why do plants need minerals?

Back

Preview of the front of card 4

Card 5

Front

what is photosynthesis?

Back

Preview of the front of card 5
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