Bacteria+Protists+and+Fungi

Bacteria Protists Fungi or Diversity of Life: Simple Organisms

You stained a prepared (heat fixed) slide of the bacterium //Bacillus cereus// using methylene blue.

When you tried focusing the microscope you probably just saw big clumps of blue stain at first. However, when you got to the highest magnification - the 100x oil immersion lens - on an area with few bacteria you should have seem something like the image below.



There were 3 slides under the demo scope. Can you identify the bacterial shapes?



Image website: []

We also looked at a species of cyanobacteria. Below you find a picture of an Oscillatoria colony. What is the shape of the colony. Look closely, what is the shape of a cell? Images above from []

We also looked at a few live creatures:

The protist Euglena was zipping across your slide, if you didn't use the agent that slows them down. media type="youtube" key="ZSbxtD8MUZ8" height="315" width="420" The next batch is shown in regular speed at first, then slowed down. media type="youtube" key="7DALQ-XLJ4Q" height="315" width="420"

Last but not least, my favorite little organism, the green algae Volvox

media type="youtube" key="v6D9OUoD7E4" height="315" width="560"

Volvox has been called one of the 7 wonders of the Micro World. Wim van Egmond from the Netherlands created a website to celebrate the beautiful little algae: []