1. Kenton College Life Cycle of Flowering Plants
Year 8 Lesson 2: Structure of a Flower (2) and Pollination
WC 3rd September 2012

2. Title: Functions of Flower Parts
WALT: describe the functions of the flower parts and the meaning of pollination
By the end of the lesson:
I must be able to describe the functions of the female and male flower parts
I should be able to explain what pollination means
I could also make predictions about adaptations of wind and animal pollinated plants

3. Close your books Can you remember from last lesson?1 5 2 6 3 4

4. Last lesson we learnt: (jot down the answers only in rough)
That a gamete is ……….
In plants, the gametes are stored in ………… and ………………
That the male part of a flower is the ……………
and the female part of a flower is the ………………..
Soil/roots
Air
Carbon
CO2 and Water to glucose and oxygen

5. In pairs, carry out the word sort
When you have worked it out, annotate yesterday’s diagram with the functions of each part under the labels you made yesterday

6. How do you think reproduction might occur in plants?
There are 4 stages: 1. Pollination 2. Fertilisation 3. Fruit formation and seed dispersal 4. Germination Today we will look at pollination.

7. Pollination
For reproduction to take place, the male and female gametes (sex cells) must come into contact with each other.
The transfer of the male gametes from the anthers to the stigma of the female carpel is called POLLINATION.
If this happens on the same plant, it is called self-pollination. If it happens between 2 different plants, it is called cross-pollination.
Transfer either takes place by wind or by insects carrying the pollen.

8. Sub heading: Adaptations for wind pollinated and insect pollinated flowers
Wind Pollinated Flowers
Insect Pollinated Flowers
Let’s play the Pollination Quiz to see some of these adaptations….volunteers required to come up! Fill in your table as we go.

9. Take a look at some of the flowers we have and see if you can tell if it is wind pollinated or insect pollinated
Could even possibly go outside if necessary

10. Insect-pollinated flowers are adapted to attract insects to them to enable transfer of pollen
Pollen has barbs for hooking onto insect fur
nectar and a scent present
Anthers positioned to rub pollen onto insects
Sticky stigma to collect pollen
Brightly coloured petals
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test

11. Wind-pollinated flowers are different in structure because they do not have to attract insects to them but do need to be exposed to the wind.
Pollen grains are very small and light. They occur in very large numbers
Anthers are exposed to the wind so that pollen can easily be blown away
Stigma are feathery to catch pollen carried on wind
Petals are small and green as there is no need to attract insects
No scent or nectary
Flower Structure Pollination Fertilisation Seed Dispersal Germination Test

12. Have a look at the video clips

13. Plenary Write a 3 question quiz for your neighbour
Swap books and ask your neighbour to answer your questions
Check your neighbour answered correctly and explain any mistakes

14. Title: Structure of a Flower
WALT: draw and describe the parts of a flower
By the end of the lesson:
I must be able to draw and identify the female and male parts of a flower
I should be able to identify the female and male parts on a real flower
I could also make predictions about the functions of the different parts