To see if baldness is caused by a high protein diet, a scientist gives
one group of men a low protein diet and another group of men a high
protein diet. what is the independent variable in this experiment?
a. the amount of protein in the diets of the men
b. whether or not the men develop baldness
c. the age of the men and the amount of water they are given to drink
d. the number of men in each group

The pattern of this wave changes between its beginning and end. what is true about the amplitude and wavelength of the wave when the pattern changes?

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.

Explain the significance of meiosis in sexual reproduction