Micro Zoo

Experiments

What You Need:

Method:
Conclusion:

Many of the the protozoa you see were living on the grass. When grass dies and dries up, the protozoa encyst (form a protective cyst around themselves). These cysts remain dormant for a very long time, waiting for rain or other water to make them active again. Other protozoa arrive through the air as cysts. Even the dust that collects on the furniture in your house is full of cysts. The yeast that you added is actually composed of tiny fungi that reproduce quickly. They feed on the nutrients from the dead grass and in turn, make excellent food for the protozoa. As the days go by, the changes in the protozoan population depends on the cysts present, their life cycle and conditions that are favourable for the growth of various protozoan species.