Revision
- Created by: Charlietonks101
- Created on: 24-03-14 12:27
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- Revision
- Discoveries
- In 1881, Charles Darwin and his son Francis performed experiments on coleoptiles.
- In 1913 a scientist; Peter Boysen-Jensen demonstrated that the signal was not transfixed but mobile.
- Weedkillers
- Organic;These are the safest weedkillers to use. Vinegar is the main ingredent!
- Granular;NOT RECOMMENDED. It is very bad for the environment. When it Rains, the granules run off!
- Liquid; Recommended for spot treatment and kills over 225 types of weed!
- Precautions
- Chemical-based weed killers can harm your pets!
- Do Not use in vegetable gardens, will ruin the vegetables!
- Organic weedkillers are harmless towards animals or vegetables!
- Do not use Chemical-based weed killers if you have asthma!
- What is a Weed Killer?
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- Discoveries
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