Simple. Air has mass. And if air has mass it also has weight. You can feel air when the wind blows. Or do an experiment. Weigh an empty container. Then pump it to a vacuum. Weigh it again. The difference is the weight of the air inside.
Answer:
I would either say prediction or a hypotheses.
Explanation:
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C. A start codon sequence
There are about 16 cells present after 80mins.
