Red-green color blindness is due to an x-linked recessive allele in humans. a widow’s peak (a hairline that comes to a peak in the middle of the forehead) is due to an autosomal dominant allele. consider the following family history: •a man with a widow’s peak and normal color vision marries a color-blind woman with a straight hairline. the man’s father had a straight hairline, as did both of the woman’s parents. use the family history to make predictions about the couple’s children.

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.

Which of the following does not result from no-till practices? a) increased herbicide use b) decreased fuel consumption c) increased plowing time d) increased integrated pest management