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THE PROCESS OF REPRODUCTION IN FLOWERING PLANTS · Self Pollination •Some plants self-pollinate....
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THE PROCESS OF REPRODUCTION IN FLOWERING PLANTS
Transcript of THE PROCESS OF REPRODUCTION IN FLOWERING PLANTS · Self Pollination •Some plants self-pollinate....
THE PROCESS OF REPRODUCTION IN
FLOWERING PLANTS
DNA
Do you remember the names of the
parts of a flower?
Extension:Which part of the flower is the female and the male?
DNA Answers
These parts are essential and pollination wouldn’t be able to take place without any one of these.
Watch these videos or read the information on the next slides to help you with today’s activities.
https://www.bbc.co.uk/teach/class-clips-video/science-ks1-ks2-ivys-plant-workshop-what-is-pollination-and-how-does-it-work/zv4df4j
https://www.bbc.co.uk/programmes/p0128z6q
The Pollination Process – by insects1. The flower petal’s bright colours and fragrant scents attract insects.
2. The insect arrives on the flower to collect nectar. This nectar is a sweet liquid whichmakes perfect insect food.
3. As the insect is gathering the nectar, it rubs against the anthers, which rub pollen ontothe insect.
4. After the insect is done feeding on the flower’s nectar, it gets hungry and gets attractedby another flower`s bright colours.
5. As the insect feeds on the nectar in this new flower, the pollen stuck to the insect fromthe first flower rubs off onto the female parts of the second flower (the stigma).
6. Part of this pollen travels down the style and then into the ovary.
7. The tiny piece of pollen joins onto an ovule in the ovary. The plant has now been fertilised.
8. The ovary of the flower turns into seeds which will then be dispersed so that new plantswill be able to grow somewhere else.
Wind Pollination• While some plants use insects to help them
transport their pollen, others rely on wind. Theseplants are usually less colourful as they do notneed to attract insects. The wind carries pollenfrom one plant to another. Rice is an example of awind-pollinating plant.
• This is a less coordinated way of pollinating, as itrelies on a huge amounts of pollen being blown inany direction, depending on the wind.
• Wind pollinating plants can cause some peopleto experience hay fever during the spring andsummer due to the large amounts of pollen inthe air.
Self Pollination• Some plants self-pollinate. They
transfer the pollen grains from theanther to the stigma on the sameflower. These plants do not need apollinator, such as an insect, in orderto reproduce.
• Only a few plants self-pollinate.Examples include peanuts, orchids,peas and sunflowers.
Task 1: Complete the tree map naming the types of pollination and a simple description
Types of pollination
By insect
The insect spreads the pollen from flower to flower.
Task 2: Pollination Process by insectsPut these statements in order using a flow map. Add pictures to explain the process if you want to.
Flow map on the next slide
Extension:
Questions to think about:1. Which conditions caused the
seeds to be dispersed furthest?2. Why was it important to keep the
fan switched on at the same speed?
3. Other than collecting repeated results, how could you check if your data is reliable?
Exit ticket:
If you were asked to create a machine which completed the pollination process quicker so we can grow more flowers:
What would it look like?
What would be it’s functions?
How would it work?
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