Your teacher gives you an unknown bacterium to observe. Select the method that would help you determine whether the bacterium is a chemotroph. exposing the bacterium to carbon dioxide to see if it fixes carbon

growing the bacterium in a sulfur solution to see if it breaks the inorganic molecules down

exposing the bacterium to direct sunlight to see if it converts light to chemical energy

growing the bacterium in an agar tube filled with protein to see if it breaks the organic molecules down

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.

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.