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The Effects of pH on the Growth and Regeneration of Hydra

The purpose of this experiment was to determine how pH level effects the growth and regeneration of the hydra. Hydra is a small animal organism that is a cousin to the jellyfish.

Hypothesis one of this experiment stated that hydra maintained at pH 6 will have the slowest growth rate. Hypothesis two of this experiment stated that hydra maintained at a pH of 6 will have the slowest regeneration rate.

The hydra were placed in culture dishes. Each had a different pH level (6,7, or 8) in them. We left the hydra in the culture dishes containing pH levels of 6,7,and 8 for three days, checking and recording daily on the growth of the hydra, and checking and recording daily on how long it took to regenerate. The experiment was repeated twice.

The results for the growth experiment indicate that hydra maintained at a pH level of 6 have the fastest growth rate. Results for the regeneration experiment indicate that hydra maintained at a pH of 6 have the fastest regeneration rate.

In conclusion, hypothesis 1 was not supported by the data and was rejected. pH 6 did not have the slowest growth rate. Hypothesis 2 was rejected also, hydra maintained at a pH level of 6 had the fastest regeneration rate.

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