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

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

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

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

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.

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.

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.

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

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

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

Have a look at the video clips

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

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