How do you define the boundaries of a watershed?

Watershed boundaries are defined by topographic divides and delineate areas where surface-water runoff drains into a common surface-water body, such as a lake or section of a stream.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

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.