Materials: 2-4 water samples from local ponds, streams, lakes, or rivers 1 glass culture dish (or depression slides) Hydra population Hydra medium Brine shrimp or Daphnea 4-6 droppers or pipettes microprojector or microscopes heat filter Strategies: A Hydra population can be maintained and reproduced in the classroom.
(A Hydra population; can be maintained; ) (A Hydra population; reproduced; L:in the classroom) (Brine shrimp; [is] medium [of]; Hydra)
A Hydra population A Hydra population Brine shrimp
can be maintained reproduced [is] medium [of]
L:in the classroom
Hydra