A hair found at the scene of a crime is long, straight, and uniform in color. The scale are flat and narrow and the cross-section of the hair is circular. Which is the most likely origin of the hair? eyebrows
head hair
pubic hair
limb hair​

Ascientist is designing an investigation to study the impact of invasive bird populations on local, native bird populations at backyard bird feeders. what population is most likely to be a control group for the investigation? amount of food number of bird feeders invasive bird populations local backyard birdfeeders without food