Two species of turtles in a pond use the same species of fish as their food. The struggle of the turtles to survive as they use the same limited resource is called?

  competition

Explanation:

Two species of turtles live in the same pond and use the same species of fish as food. The struggle of the turtles to survive as they use the same limited resources is called competition. An interaction in which one organism kills another for food or nutrients. For example: A heron preys on carp.

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when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error