Structures And Functions Of The Parts Of A Flower Flashcards
List the different parts of a flower.
5
Receptacle
Sepals
Petals
Stamens
Carpels
Describe the receptacle of a plant.
2
The receptacle is the part of the flower from which the flowering parts arise
It supports these parts
What is the function of the receptacle?
The flowering parts of the plant arise from the receptacle
It supports the flowering parts of the plant
What part of the plant do the flowering parts arise form?
The receptacle
Describe the sepals of a plant.
3
Sepals are originally green, leaf-like structures
Once the flower opens out the sepals often turn brown
The function of sepals is to protect the flower when it is a bud
What colour are the sepals before the flower opens?
They are green (leaf-like structures)
What colour are the sepals after the flower opens?
They are brown
What determines the colour of the sepals?
If the flower is open or closed
What is the function of the sepals?
To protect the flower when it is a bud
Describe the petals of a plant.
2
In animal-pollinated plants, petals are large and brightly coloured to attract animals (especially insects)
In wind-pollinated plants, petals are small (or absent) and green
In what type of plants are the petals large and brightly coloured?
In animal-pollinated plants
Why are the petals large and brightly coloured in animal-pollinated plants?
To attract animals especially insects
Describe the petals of most animal-pollinated plants.
2
Large
Brightly coloured
In what type of plants are the petals small or absent and green?
In wind-pollinated plants
Why are the petals in wind-pollinated plants, small or absent and green?
Because they don’t rely on animals for pollination and therefore don’t need to attract them
Describe the petals in most wind-pollinated plants.
2
Small or absent
Green
Describe the stamens of a plant
The male parts of the flower
Consists of a thin stalk or filament
Filament contains a vascular bundle to bring food and water up to the anther
The anther produces pollen grains on its inside as a result of meiosis
What are the stamens?
The male parts of the flower
Describe the structure of the stamens.
Consist of a filament (a thin stalk) which contains vascular bundles which bring food and water up to the anther where pollen grains are produces in the inside
Describe the filament.
2
A thin stalk contains a vascular bundle
An anther is found at the top of the filament
What does the filament contain?
A vascular bundle
What is the function of the vascular bundle in the filament?
It brings food and water up to the anther
What is the function of the anther?
It produces pollen grains on its inside as a result of meiosis
How does the anther produce pollen grains?
As a result of meiosis
Where in the plant are pollen grains produced?
The anther
Describe the carpels
7
The female parts of the flower
Consists of a stigma, a style and an ovary
Pollen lands on the stigma
The pollen tube grows through the style
The ovary contains one or more ovules
Meiosis occurs in the ovule to produce a structure called the embryo sac
After fertilisation the ovule becomes the seed and the ovary becomes the fruit
What are the carpels?
The female parts of the flower
Name the consisting parts of the carpels
3
Stigma
Style
Ovary
What is the function of the stigma?
Pollen lands on the stigma
What is the function of the style?
The pollen tube grows through the style
What is the function of the ovary?
The ovary contains one or more ovules
What part of the plant protects the flower when it is a bud?
The sepals
What part of the plant attracts animals?
The petals
What part of the plant is the male part of the flower?
Stamens
What part of the plant is the female part of the flower?
Carpels
Where does meiosis take place in the female part of the flower?
In the ovule
What occurs in the ovule?
Meiosis occurs
What does meiosis in the ovule produce?
A structure called the embryo sac
What produces the embryo sac?
Meiosis in the ovule
What happens to the ovule after fertilisation?
The ovule becomes the seed
What happens to the ovary after fertilisation?
The ovary becomes the fruit
What becomes the seed after fertilisation?
The ovule
What becomes the fruit after fertilisation?
The ovary
