Living Cells (Biological Systems)

Thinking about learning


The Learning Log

After each lesson complete a learning log at the back of your jotter. A learning log should include at least two of the following headings, especially 5): The headings should start ...
1) I really enjoyed ....
2) I want to find out more about ....
3) I was unsure about ... .
4) I was surprised by ...
5) I learned that ...

For more information on learning logs click for the
The Young Scientist's Handbook .
and see page 4.

Homework 1 .... Calculating cell size

The hole in the stage is about 1 cm in diameter. The diagram below shows image of an; onion, cheek and blood cell as seen through the eyepiece of a microscope. A 1 cm rule is overlaid on the image and is not affected by the magnification.
i) Study closely the three diagrams below, calculate the size of each cell in microns and present your answer in a table.
ii) Check to see if your answers are close to official estimates. Remember to cite your sources.

Calculating cell size


Homework Task


Risks and benefits of DNA profiling DNA profiling is when a sample of a personís DNA is compared to a database to provide information about the individual.
It can be used for many situations.
Your task is to find out;
∑ what DNA profiling actually is
∑ what DNA profiling is used for in society already
∑ what DNA profiling could be used for
∑ what are the risks and benefits of DNA profiling
At the end of your research, you should be able to produce a report which answers all the above points. You can present your report in any way you wish, e.g. newspaper article, poster, presentation, or leaflet. At the end of your presentation you should also add whether you think DNA profiling is a good or bad thing.