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Monday, 10 April 2017
Biology
Photosynthesis
- Photosynthesis is a process by which all green plants make their own food (glucose)
using carbon dioxide, water light and chlorophyll
...
- Photosynthesis mostly takes place on the leaves of all green plants (chlorophyll
makes the plant green, so photosynthesis takes place wherever there is chlorophyll)
- USES OG GLUCOSE:
- 1) glucose is used in respiration to produce energy
- 2) glucose is converted into cellulose to make cell walls
- 3) glucose is converted into fats and stored in seeds
- 4) glucose combines with nitrogen to make animo acids which form proteins (needed
for growth)
- 5) glucose is converted into starch for storage because starch is insoluble so doesn’t
affect water movement in the cell
- 6) glucose is converted into sucrose and stored in fruits
- MINERALS:
- Nitrogen: making proteins for growth
...
These minerals are washed into the soil
...
Fertilisers can get washed into lakes and rivers cause eutrophication
- EUTROPHICATION is when excess fertiliser gets into water and cause algal bloom
...
Chemical fertilisers are also expensive, however
they are fast acting
...
NPK stand for nitrogen (N), phosphorus (P)
and potassium (K)
...
The plants
aren’t placed in soil but in a mineral solution that is pumped around the roots of the
plant
...
The absence of soil also helps the plant grow because no creatures that live in the soil
can harm or damage the plant, which means the plants can be grown in places with
no soil
...
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