Download Flowers and Plant Reproduction

Flowers and Plant
Reproduction
Online Lesson 1
Watch this first, and then answer the questions
on the worksheet.
Plant Reproduction
•Plants reproduce and make seeds via their sexual organs,
flowers. This needs to occur for the survival of their species.
•Flowering plants are known as angiosperms. Not all plants
flower and reproduce this way.
•Although all flowers have common parts, variations occur
within these parts.
•Flowering plants make up the most of the Plant Kingdomi.e. there are more flowering plants than any other type of
plants.
•Many flowering plants form fruit around the seed once it has
been fertilized.
Example of a flower
Graphic drawn by myself on
Microsoft Paint and Adobe
Photoshop.
Parts of a flower
As you can see, flowers have several parts, these are:
•Petals- These are for protecting the inner parts of the
flowers, and attracting potential carriers of pollen.
•Sepals- These are left over leaves that are used when to protect the
flower when it’s a bud.
•Anther- This contains the pollen.
•Filament- The stalk of the stamen. Together the Anther and
Filament form the Stamen.
•Stamen- formed by the anther and filament, the male reproductive
organ of a flower.
Parts of a flower cont.
• Stigma- the receptive part of the female reproductive organs, on
which pollen germinates.
•Style-Elongated part of female reproductive organ, which bears
stigma.
•Ovary- Hollow region of Carpel, contains ovules (eggs).
•Carpel- The female reproductive organ which is made up of the
stigma, style and ovary. Also called the pistil.
Complete/ Incomplete Flowers and Perfect/ Imperfect Flowers
As mentioned earlier, most flowers are similar, but not the same.
A complete flower is a flower that has all parts (petals, sepals,
stamens and carpels) present.
An incomplete flower is one that is lacking one or many of these
parts.
A perfect flower is one that has both male and female
reproductive organs (e.g. lily), and an imperfect flower is one that
only has one reproductive organ (e.g. hazelnut flower).
References
All graphics used in this presentation are from Microsoft Clipart,
except the flower diagram.
•http://biology.about.com/od/plantbiology/a/aa100507a.htm
•http://www.fastplants.org/pdf/activities/WFP_growthdevelopment-06web.pdf
•http://www.kew.org/ksheets/pdfs/b4flower.pdf