I'm not totally sure. But in my view, <span>(4)a salt solution</span> would be used to prove that the gas produced by the yeast in the vacuum bottle could change the pH of the liquid in the flask
The correct answer is: [D]: "receives venous blood from the lower extremity" .
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A) Taiga
This is shown by the cold winters and the animal life in the example.
The base pairs are put into different orders and these orders code for different amino acids.