Sunday, 9 August 2015

Week Two in the lab.

This week in the lab, we looked at onion cells, we took bass line measurements from 3 different sized ponds in the garden for a future study and we looked at some small water organisms.

Firstly, we took some of the onion layer that was between the actual fruit and the dry, brown outside skin to see the epithelial cells of an onion.  We stained the material in the same way as the blood slide in order to be able to see the nucleus and other cell parts. Below is a photograph that we took through the microscope . These are several cells grouped together. You can clearly see the nuclei (small dots), cytoplasms (inside the walls) and cell walls.

Photo I took of stained onion cells 

  From one of our ponds we took a sample of muddy silt and we examined it and we found a very interesting organism.  It is called a paramecium. A paramecium interests me because it is a one celled organism. It is neither animal or plant yet it still appears to move and eat.This a video of a paramecium.

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