Nutrients are absorbed into the bloodstream through small finger-like nodules on the wall of the what called villi.

/the trachea, commonly known as the windpipe

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.