a control helps to increase the reliability of the results. it allows a scientist to compare it to other group(s) in an experiment. if a scientist notices a significant different btwn the control and the other groups, he can logically conclude that the independent variable has an impact on the dependent variable.
a variable is any factor, trait or condition that can exist in differing amounts or types. there are usually three tpes of variables in experiments: the independent, dependent and contolled. the independent variable variable is the one that is changed by the scientists to figure it's affect on something.
Answer:
Protein - WHITE
Gene - <em>white (italics)</em>
Phenotype - white
Explanation:
Usually, in genetics, to make it clearer whether the gene, protein, phenotype, mutation, etc. are being talked about, different styles are used. These actually differ between different organisms which makes it even more confusing!
Usually, the gene name is denoted in italics, and the protein is in capital letters. The phenotype is always written as normal.
An example of an dramatic environmental event can be deforestation, or it can be animals losing their homes.