Lwhat is the nature of chromosomes that align themselves on the metaphase plate in metaphase i?

a: pair of sister chromatids facing opposite poles

b: pair of nonsister chromatids facing opposite poles

c: pair of tetrads facing opposite poles

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