A confounding variable refers to an external effect, which modifies the influence of an independent and dependent variable. This extraneous effect is used to affect the outcome of an experimental design. The confounding variables can ruin the experiment and can generate unnecessary outcomes.
In the given case, confounding variables can be introduced by testing multiple hypotheses at a time and by using distinct kinds of soil in each of the samples.
Answer:
1. put bb above the box and Bb on the left side then fill out with the variations Bb,Bb,bb,bb one phenotype is brown which is Bb genotype the other is blue witch is bb genotype
2. Do the same as you did for one
Explanation:
<span>a. parietal cells
hope this helps :)</span>
Well, natural variation provides the raw material for natural selection,which in turn leads to evolution