What is the missing body part for the frog??

Oyster is a type of aquatic organism that significantly require oxygen for its survival and other metabolic processes.

What is Population?

A Population may be defined as the group of individuals belonging to the same species living in the same area at a particular time period. It includes the members of the same species.

The population of oysters requires at least 2-3 ppm of dissolved oxygen in order to survive in the aquatic environment. But if this amount of dissolved oxygen may alter it may significantly affect the population of oysters.

The higher level of dissolved oxygen is not a reason for much concern, but lower levels may be the potent cause for the reduction of the oyster population within the ecosystem.

Therefore, the Oyster is a type of aquatic organism that significantly require oxygen for its survival and other metabolic processes.

To learn more about the Oyster population, refer to the link:

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Observations made of bacteria culture once a week over a month period is an example of time sampling. Time sampling is a method of collecting data or information where the tested sample is observed over a specific time duration for certain length of experiment period to observe whether a change took place or not in the sample. Other example would be to observe when and for how long a tiger is seen hunting its prey.