B5: Reproduction in Flowering Plants Flashcards
Identify the missing label:
What is the function of the anther?
It produces pollen
Why are flower petals usually bright colours?
To attract insects/pollinators to them.
The female reproductive parts of a flower are called the…
Carpel
Name the two methods by which plants can be pollinated.
By wind
By insects/animals
Identify the missing label:
When pollen is transferred to the stigma it is called…
……pollination
What is the female gamete in a flowering plant?
Ovules
Describe the flowers of wind-pollinated plants.
- Small dull petals.
- No nectar.
- Large amounts of pollen made.
- Pollen is very light.
- Anthers dangle out of plant to make easy for pollen to escape.
- Stigma hangs out of plant so can catch pollen easier.
Describe the flowers of a plant that is fertilised by insects.
- Brightly coloured, sweet smelling petals to attract insects.
- Some flowers make nectar which bees use to make honey.
- Small amounts of pollen are produced.
- Pollen is spiky so sticks to insects.
- Anther and stigmas are held firmly in flowers so insects can rub against them.
- Stigma has a sticky coating, so pollen sticks to it.
Give examples of how seeds are adapted to different methods of dispersal
- Parachute e.g. dandelion
- Wings e.g. sycamore
- Floating in water e.g. mangrove
- Animals e.g. thistle
What is the function of the stimga?
It is the sticky part of the carpel that cathes grains of pollen.
Identify the missing label:
The male reproductive parts of a flower are called the…
stamen
What is the function of the ovary?
It contains the ovules (female gametes)
When the nucleus of a pollen grain and ovule fuse together we call it…
Fertilisation
Describe how fertilisation, in flowering plants, leads to the formation of a fruit containing seeds.
- Pollen grain lands on stigma.2. Tube grows from pollen grain down through style.3. The pollen nucleus moves down the tube.4. The pollen nucleus joins with the ovule nucleus (fertilisation).5. A fruit containing seeds will then form.
Which part of a flowering plant turns into a fruit after fertilisation has happened?
The ovary.
Which part of a flowering plant turns into the seeds after fertilisation has happened?
Ovules
Which 3 parts do all seeds have?
- A seed coat.
- An embryo
- A food store (starch)
What is the function of the seed coat of a seed?
It protects the seed.
What is the function of the food store of a seed?
It provides food to the plant embryo before it starts to do photosynthesis.
What do we call it when a seed first starts to grow?
Germination.
What does a seed need to germinate?
- Water
- Warmth
- Oxygen
(NOT LIGHT!!)
Why does a seed need water to germinate?
It makes the seed swell up, breaks the seed coat and allows the embryo to start growing.
