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Identify the Parts of a Flower Involved in Reproduction

In this worksheet, students will be introduced to different parts of the flower and learn which are required for reproduction.

'Identify the Parts of a Flower Involved in Reproduction' worksheet

Key stage:  KS 3

Curriculum topic:   Biology: Structure and Function of Living Organisms

Curriculum subtopic:   Reproduction

Difficulty level:  

Worksheet Overview

Do you understand how flowering plants reproduce? It's a little different to how humans do!  Did you know that most plants have two distinct sexes?  These two sexes can even appear on the same flower! 

There are 3 key processes that we are going to look at in this activity:

Pollination

Fertilisation

Dispersal

 

Flowering plants reproduce by the process of pollination.  

 

Pollination helps the fertilisation of flowers by passing on their pollen.

 

First, let's look at the structure of a flowering plant so that we can understand how this process can happen.

 

 

Flowering plants comprise of the following structures which complete the following functions:

Sepals - when a flower is still a bud its petals are protected by sepals

Petals - surround the reproductive part of a flower and are brightly coloured to attract pollinators

Stamen - The male parts of the flower (each consists of an anther held up on a filament)

Anthers - produce male cells (pollen grains)

Pollen grain - The structure produced in the anthers of a flower that contains the male gamete (sex cell)

Gamete - Sex cell (sperm in males and ova/eggs in females)

Stigma - the top of the female part of the flower which receives pollen

Ovary - the female organ of a flower which produces the female sex cells and contains ovules

Ovule - Part of the female reproductive tissue in plants, contains the ovule

Nectar - a sugary solution produced by flowers to attract pollinating animals

 

In order for a plant to reproduce the process of fertilisation must take place.   But how does this happen in plants?

 

The anthers of the stamen produce pollen (you'll see these are referred to as the make parts of the flower) 

Each grain of pollen in a flowering plant contains a male gamete (male sex cell). 

 

In order for a flower to reproduce this male sex cell must come into contact with the female sex cell.  This is where pollination comes in!  Pollen can travel between plants in two ways:

 

1) By insects (insect pollination)

2) By the wind (wind pollination)

 

The stigma is the top of the female part of the flower, and it's the part that receives the pollen.  It's often sticky in order to trap the pollen.  From here, a pollen tube grows through the style to the ovule inside the ovary where it fertilises the ovules (egg cells) to make seeds. This process is called fertilisation: the joining of a male and female gamete.

 

After successful fertilisation seeds begin to form in the ovules.  In order for these seeds to go on to become plants themselves, there is one final step in this process.  The seeds are scattered by animals or the wind by a process called dispersal. Some of the seeds will grow into new plants, then the whole process starts over!

 

Now, let's put your knowledge of each plant part to the test...

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