Thursday, February 11, 2010

Pomegranate 2!!

Oliver Conor and Christopher give their verdict. - The pomegranate is a good model as seeds get nutrients from the pomegranate like the mother gives food to the baby. Their are lots of seeds in a pomegranate like their are lots of eggs in the ovary. The eggs are fertilised by pollen like the egg are fertilised with sperm. There is a difference as only one ova matures in a human but all the seeds mature in the pomegranate.
Melissa, Amy, Georgina and Shannon think it is a good model because the skin protects the seeds like the mothers womb protects the baby. A pomegranate gets a good supply of nutrient from the tree like a human gets a good supply of nutrients from the blood that flows from the placenta.
There is one difference though a pomegranate keeps producing seed but a mother stops making eggs when she is about 50.
James, Nico, Euan, Nathan and Nicol. We think it is a good model too because the seeds represent all the ova in the human. The skin means you can't see inside the fruit just like you can't see inside the mother. Both pomegranates and eggs need vitamins to grow.
Here we are having a pomegranate tasting session as they are good for preventing heart disease and some cancers.





Wednesday, February 10, 2010

Pomegranate

I understand the processes of fertilisation and embryonic development and can discuss possible risks to the embryo.

SCN 3-14a


Is a pomegranate a good model for the human ovary? This is the question S1 are answering! They have studied reproduction in humans and in plants so now they are making a comparison. They will be given their verdict tomorrow after they have played the pomegranate game.



Thursday, February 4, 2010

To modify or not to modify.

I can debate the moral and ethical issues associated with some controversial biological procedures. SCN 4-13c

S3 have been studying genetic engineering. They have been looking at the debate surrounding genetically modified food. To do this they have been using Democs resources produced by the New Economics Foundation.
This is a new approach to involving citzens in public policy issues. The pupils play the democs "game" which involves research, reading and discussion of the issues. They put themselves into "role play" positions given to them on story cards.
After this they vote on policy positions and send their results to NEF who will collate the results and use them to inform the government of the views of the public. They take this into consideration when making new policies on controversial issues. So when a policy is put in place Cedars biology pupils will have had their say!

Here are a few of the cards (there are too many resources to show them all here)






Wednesday, February 3, 2010

Photosynthesis can't get more exciting than this!

I have collaborated on investigations into the process of photosynthesis and I can demonstrate my understanding of why plants are vital to sustaining life on Earth. SCN 3-02a

Can you take a jug of water, some sunlight and some carbon dioxide from the air and make a bag of sugar? Can you produce oxygen needed for all life on the planet? S2 are studying the amazing Cabomba plant who like all green plants can do both these things without even a brick on the wall. Here are S2 investigating how different light intensities affect the rate of photosynthesis. If you click on the video you'll hear them counting the number of bubbles of oxygen being produced!