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Tuesday, 29 November 2016
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Monday, 14 November 2016
Pollination and fertilisation
We already know that some plants have flowers and that the flower is the reproductive organ of a plant, but did you know that most flowers have male and female reproductuve organs?
The stamens are the male reproductive organs and these produce pollen.
The carpel is the female reproductive organ and this includes the stigma and the ovary. The ovary produces ovules.
For plants to reproduce, the pollen first has to travel froma the stamens to the stigma. We call this process pollination.
It can be in two different ways:
- Animal pollination
- Wind pollination
Fertilisation occurs when pollen joins with an ovule. This process happens in the stigma. The fertilised ovule becomes a seed. The stigma develops and forms a fruit around the seed. When a seed lands in soil it can germinate and a new plant grows.
The stamens are the male reproductive organs and these produce pollen.
The carpel is the female reproductive organ and this includes the stigma and the ovary. The ovary produces ovules.
For plants to reproduce, the pollen first has to travel froma the stamens to the stigma. We call this process pollination.
It can be in two different ways:
- Animal pollination
- Wind pollination
Friday, 11 November 2016
Monday, 7 November 2016
How plants make their own food?
The food we eat comes from plants, but how do plants get their food?
Plants make their own food, and to do this they need water, minerals, light, energy from the Sun and carbon dioxide. The roots absorb water and minerals from the soil. The water and minerals travel up the stem to the leaves.
Plants make food in their leaves. This proce4ss is called photosynthesis. The leaves absorb carbon dioxide from the air through small holes. Using energy from the Sun, the carbon dioxide combines with water, minerals and sunlight to make food. During the process of photosynthesis, plants release oxygen into the air. People and animals need oxygen to breathe.
Friday, 4 November 2016
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