Advanced Level Biology
A2 Research Assignment
Module 5a Environment
Human activites can impose far-reaching effects on the environment.
In groups you will research one of the following aspects.
This website has been produced to help you with your revision.
Try all the links, making revision notes and attempting all the quizzes.
If you have any questions or need any help please add comments.
GOOD LUCK
Module 5a Environment
Human activites can impose far-reaching effects on the environment.
In groups you will research one of the following aspects.
- Ecological impact of farming - impact of monoculture, removal of hedgerows, organic wastes from farmland, eutrophication.
- Pesticide toxicity- Bioaccumulation of pesticides. Biological control methods.
- Problems caused by the fishing industry-Bycatch, Ghost nets, Overfishing.
Your task will be to produce a revision booklet on your given area of research, which will include revision notes, past exam questions and answers, revision tips, bibliography. I will photocopy these to ensure all of you have the information.
You will also have to complete a short presentation - this could include a poster and / or a powerpoint.
GOOD LUCK - you have 2 weeks to complete this work!
This website has been produced to help you with your revision.
Try all the links, making revision notes and attempting all the quizzes.
If you have any questions or need any help please add comments.
GOOD LUCK
posted by Mrs Garland @ 12:29 pm
2 Comments:
At 7:03 am, September 12, 2006,
Anonymous said…
1.Explain why a scanning electron microscope produces more detailed images of cells than a light microscope.
The electron beam hasa smaller wavelength than the light wave, the microscopes can resolve an image that is upto half its wavelength in nano metres, because the electron microscope has a smaller wavelength it is able to resolve images closer together.
2.Give two disadvantages of using a transmission electron microscope.
They are expensive
They are very large
Require extensive training
Specimens need to be specially prepared this takes a long time and training.
From
Peter and Damien
At 1:09 pm, September 06, 2007,
Anonymous said…
Explain why a scanning electron microscope produces more detailed images of cells than a light microscope.
The electron microscope has a much higher magnification aswell as high resolution. The electron microscope works by concentrating a beam of electrons on the specimen. This allows an extremely detailed picture of the specimen.
Give two disadvantages of using a transmission electron microscope.
They are very expensive
The picture only comes out in black and white not the specimens natural colours
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