Guys This is a tricky question. Mutations in certain genes of bacteria cause them to be resistant to powerful antibiotics. What type of Mutation is this for the bacteria? A. beneficial B. harmful C. neutral D. both beneficial and harmful

Paleontologists have found plant fossils deep within the layers of the north polar region. these leaf fossils have been labeled as to the rock layers they were found in, with the lower numbers being layers close to the earth's surface and higher numbers representing deeper layers. according to the numbers of these four leaf fossils, what might you infer?