IGCSE Biology Double Award Plant Reproduction Notes

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  • Created by: Bryony
  • Created on: 22-02-13 20:05
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PLANT REPRODUCTION
Insect Pollinated Wind Pollinated
FEATURE: Large, brightly coloured petals. FEATURE: Small petals (often dull colour).
REASON: To attract insects. REASON: No need to attract insects.
FEATURE: Often sweetly scented. FEATURE: No scent.
REASON: To attract insects. REASON: No need to attract insects.
FEATURE: Usually contain nectar. FEATURE: No nectar.
REASON: To attract insects. REASON: No need to attract insects.
FEATURE: Moderate quantity of pollen. FEATURE: Large quantity of pollen.
REASON: Less wastage than with wind REASON: Most doesn't reach another flower.
pollination.
FEATURE: Pollen often sticky or spiky. FEATURE: Pollen very light and smooth.
REASON: To stick to insects. REASON: It can be blown in the wind.
FEATURE: Anthers firm and inside flower. FEATURE: Anthers dangle out ­ loose.
REASON: To brush against insects. REASON: To release pollen into the wind.
FEATURE: Stigma inside flower. FEATURE: Stigma hangs outside the flower.
REASON: So that the insect brushes against it. REASON: To catch the drifting pollen.
FEATURE: Stigma has sticky coating. FEATURE: Stigma feathery or net like.
REASON: Pollen sticks to it. REASON: To catch the drifting pollen.

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Fertilisation is the fusion of the male gamete (the pollen nucleus) with the female
gamete (the ovule nucleus).
Asexual reproduction is the production of offspring from only one parent.
It is possible for plants to reproduce asexually (i.e. without flowers or fertilisation).
Plants which are produced in these ways are genetically identical to each other and to
the parent; a group like this is called a clone.…read more

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ASEXUAL REPRODUCTION:
only one parent plant is required
young plants are identical to the parent, so that good features will always be
passed on
SEXUAL REPRODUCTION:
characteristics are inherited from two parents - this produces variation in the
offspring;
This gives a good chance of at least a few surviving diseases, changes of climate,
etc.…read more

Comments

iqrxo

thank you x x 

IG Student

Perfect Notes 

Brittany - Team GR

Thanks for sharing this resource! :)

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