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The Life Cycle of a Plant by Meagan Mathers
Transcript of The Life Cycle of a Plant by Meagan Mathers
Germination Seedling Young plant Pollination Fertilisation Seed dispersal Plant Germination is when the seed starts to grow.When the seed cracks, tiny roots and shoots appear and grow into a new plant.
Germination depends on:
Water- enough water is needed to make the seed swell and break the seed pod.
Oxygen- seeds get oxygen from the soil around them and if they are packed to far into the ground or water logged they wont be able to get oxgen and will not grow.
Tempreture- effects the growth rate as seeds will only grow at a certain temperature (varys from plant to plant) and not above or below that tempreture.
Light and darkness- most seeds are not effected by light and dark but some species of plants wont grow until there is enough lightness.
http://en.wikipedia.org/wiki/Germination Bibliography The seed then grows a embryonic
root, a shoot and some seed leaves
then become a seedling... The roots of the seedling grow,
the stem grows and the plant
The plant strengthens,
grows more leaves and
produces flowers Pollination is the process of getting pollen from the stamen
to the carpel. The carple contains the eggs, and the stamen contains
the pollen grains. There are two types of pollination: Cross Pollination and self pollination. Self pollination is where the pollen from the anther the plant lands on its stigma and self pollinates its self. Cross pollination is when the pollen from another plant's anther gets blown by the wind or carried by bees to the stigma. Cross Pollination is much better for a plant because if a plant self pollinates all its offspring have exactally the same genes wereas when plants cross-pollinate the offspring have different genes and therefor different properties and a higher chance of survival. When the pollen grains get caught on the stigma the sticky fluid on the stigma causes the pollengrains to grow pollentubes down the style into the ovary. The pollen grains and the egg join and the egg becomes furtilised and then becomes a seed. http://www.thekidsgarden.co.uk/TeachKidsAboutPollination.html The fruit and seed of a plant is carried away from the plant to stop over crowding and insure that the offspring dont have to compete with the Parent plant for things such as water. The seeds are carries in the wind or with animals. when the fruit is eaten by animals the animal disperses it and the plant starts to grow. These seeds are
carryed by the wind. Palm trees dispearse
their coconuts by water. The Flower: http://simple.wikipedia.org/wiki/Seed_dispersal Flower Part: Function: The Anthers contain the pollen sacs. The sacs release pollen on insects and lets go into the wind. The pollen once deposited on the insect is transferred to the stigma of another flower or the same flower.
Petals Petals are used to attract insects into the flower like bees so they can pollinate the plant. Stigma The Stigma Is covered in a sticky substance that the pollen grains will stick to. Style The style raises the stigma away from the anthers to decrease the risk of selfpollen. The ovary protects the ovule and once fertilisation has taken place it will become the fruit. Stalk Anther Ovary the stalk is to hold up th eflower so it can catch pollen grains from the wind and so bees can find the flower. http://www2.bgfl.org/bgfl2/custom/resources_ftp/client_ftp
/printouts/floweranatomy.shtml moodle.!!! :D i hope you enjoyed my prezi!
By Meagan Mathers 10LS! THE END!