Which of the following statements best explains how some neurons in the primary auditory cortex help people recognize and distinguish between the sounds they hear? A) Some neurons prefer a certain frequency, such as high sounds.
B) Some neurons combine information from the specialist cells.
C) Some neurons categorize sounds into their specific frequency.
D) Some neurons process specific types of sounds, such as voices.

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. 

Ecological footprint is determined by measuring carbon dioxide emissions for a given region.