Magnetic field i would say
Plants are made from Meiosis no matter what
<h2>Answer:</h2>
As John is testing the effect of temperature on the solubility of sugar in water. To test this, he will measure the amount of sugar dissolved at different temperature level.
And then he will compare and conclude this that at what temperature how much sugar dissolved and how saturated and supersaturated solutions show a difference in concentration of sugar dissolved on the temperature difference.
Crossing over can create genetic variation. Crossing over is when chromosomes cross over they give + take a part of another chromosome which can create different variation in genes.