Difference between ovovivipary and vivipary

Since the viviparous animals are those whose offspring develop inside the mother's body, where they receive oxygen and food. Mammals, including man, are viviparous.

Viviparous animals already are those whose pups are born from eggs, but these eggs develop inside the mother's body until the moment of birth and the embryo receives nourishment from the egg itself and not from the mother. The shark and some snakes.

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The answer to this will be from your lab notes/procedure. it would be best to ask another student who participated in the lab as we do not know what was done, what enzyme or if the temperature is celsius or fahrenheit. if i were to guess though i'd say the rate stopped due to enzyme denturing at high temperature