B3 revision tool 3
- Created by: Elzi551
- Created on: 03-10-15 13:13
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- Biology Unit 3
- Respitation
- Aerobic
- Happens when there is plenty of oxygen available
- It's the most efficient
- glucose+ oxygen - carbon dioxide+ water (+energy)
- Anaerobic
- Happens in vigorous exercise when your body can't supply enough oxygen to the muscles
- glucose is only partly broken down which forms lactic acid
- can be painful if it builds up in the muscles
- glucose- lactic acid (+energy)
- Aerobic
- selective breeding
- This is selecting the best plants or animals to pass on their characteristic to the offspring.
- the best offspring will be selected to then breed them, and so one over several generations
- this will make the desirable trait get stronger and stronger
- Cloning
- It is good as you can mass product a desirable characteristice.g. animals that are suitable for human transplants.
- human embryos could provide stem cells for cell therapy
- However clones of animals are often unhealthy and die permaturely
- there are many other ethical issues too
- Respitation
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