Consider the following planned experiment. which variable is being tested in this experiment? a. housing b. type of food c. vitamins d. amount of water

C. Vitamins

Explanation:

The factor Vitamin is being tested in this experiment. For an experiment to occur, it is necessary that we plan an experimental group as well as a placebo group (control group). In this experiment, all other factors have the same experimental group as well as the same placebo group except for the factor vitamin. The factor 'vitamin' has a experimental group in which the particular vitamin is given to the  object of test and a placebo group in which the vitamin is not given to the object of test. Hence, vitamin is the variable that is being tested in this experiment.

not the best question format lol but what i think might as scale color is controlled by a single gene with two alleles, the green allele and the yellow allele. when moths that are homozygous for green scales are mated with moths that are homozygous for yellow scales, 100% of the offspring have green scales.