Answer:
Because melting can be reversed ( freezing )
Explanation:
Physical change is a change that can be reversed
We could say that there are five steps in scientific method: observation, hypothesis, prediction, experiment and conclusion. Observation is the first step and we could also call it research. In this step we must understand the problem in the right way. The hypothesis is the possible answer, based on the research. Prediction is even more specific than the hypothesis: on this stage, you must know how will you demonstrate that your hypothesis is true. Experiment tests your hypothesis and shows whether your hypothesis was true or false. After that you can proceed to making conclusion, which summarizes the experiment's results, and tells do the results match up to hypothesis and in which way.
Homozygous: this means that the man has two genes for unattached earlobes, so whichever of these gene genes is transmitted to the child, it will be unattached. Since having unattached earlobes is a result of a dominant gene, one such gene is enough and the child will definitely have an unattached earlobe.
