About me
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Ratings & Reviews
Sarah (Parent from Lewes)
May 21 2017
Hi Iona I just wanted to say thank you for tutoring my son Joe in Biology. It made a huge difference to his level of understanding and he was able to enjoy the subject much more. His grades went up too, from D in the mocks to an A before the summer exams, so fingers crossed. Whatever his result, well done and thanks again for your help. Best wishes Sarah Rideout
Sarah (Parent from Lewes)
February 23 2017
Joe (Student)
January 26 2017
Jacinda (Parent from Horsham)
October 7 2016
Qualifications
General Availability
| Pre 12pm | 12-5pm | After 5pm | |
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| mondays |  | | |
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Subjects offered
Questions Iona has answered
How can you stop a cell culture from becoming contaminated?
Sterilising petri dishes and agar before use.
Taping lid of petri dish whilst microbes are glowing.
Sterilising innoculating loops before use.
Carry out experiment near bunsen burner for updraft.
Sterilising petri dishes and agar before use.
Taping lid of petri dish whilst microbes are glowing.
Sterilising innoculating loops before use.
Carry out experiment near bunsen burner for updraft.
How does eutrophication work?
1. Fertilisers containing nitrogen are washed from fields to rivers and ponds.
2. This effectively fertilises the algae in the pond causing an 'algal bloom'.
3. The layer of algae on the surface stops sunlight from getting to the plants below. This means they cannot photosynthesize to produce oxgen.
4. The plants die which further depletes the oxgen in the water as the bacteria decomposing them use oxygen.
5. The low oxygen levels cause fish and other organims in the water to die.
1. Fertilisers containing nitrogen are washed from fields to rivers and ponds.
2. This effectively fertilises the algae in the pond causing an 'algal bloom'.
3. The layer of algae on the surface stops sunlight from getting to the plants below. This means they cannot photosynthesize to produce oxgen.
4. The plants die which further depletes the oxgen in the water as the bacteria decomposing them use oxygen.
5. The low oxygen levels cause fish and other organims in the water to die.
