Let's say you want to know if the type of soil affects how long it takes a seed to germinate, and you decide to set up a controlled experiment to answer the question. You might take
five identical pots, fill each with a different type of soil, plant identical bean seeds in each
pot, place the pots in a sunny window, water them equally, and measure how long it takes
for the seeds in each pot to sprout. The types of soil are regular topsoil, topsoil with sand,
topsoil with rocks, topsoil with mulch, and topsoil with clay.

What is the question you are trying to answer?

Not sure what you mean by this question

In the air and in the lower fre ah water

The answer would be c, white eyes are homozygous recessive. in the early 1900s, morgan conducted several experiments with vinegar  flies (drosophila). one  sample revealed an anomaly: a  white-eyed, single male fly. he attempted to breed this fly with the typical red-eyed females. the offspring were all red-eyed. using flies from this new generation (brother-sister pairs)  produced some red-eyed and a few white-eyed flies. the white-eyed were all male. in later experiments, he was able to produce white-eyed females. this proved that white eyes are not lethal to either sex (ruling out a and b). since the percentage of white eyes to red eyes is so low, white eyes are not a dominant trait. it would be a recessive trait.