Amethod of wastewater treatment in which wastes, such as organic material, is consumed by bacteria is called: a. acid mine treatment. b. activated carbon. c. activated sludge. d. disinfection.

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.