Answer:
D is the correct option
Explanation:
expansion of water is not significant over day night temperature
Answer:
1. hydrogen; 2
2. it means two strands of DNA twisted around each other like a winding staircase
<span>True. A valid hypothesis must be testable and able to be verified or disputed empirically, because otherwise it is not a scientific hypothesis. A hypothesis that is not readily testable (for example, about a made up or fictional event) are not good hypotheses.</span>
