B)the confirmation of the double-helix structure of DNA
<span>Research method is always used to answer every scientific inquiry and in gaining evidential data or knowledge. The scientific method has the following process or at least undergoes the process of
1. Observation</span>
2. Hypothesis
3. Experimentation
4. Interpretation of data
5. Evaluating the data
<span>6. Passing and recording the data </span>
The answer is an organism
The answer is Eukaryotes.
ANSWER: Nitrogen, oxygen or gas, dust particles
Physical change as no new substance is created