Enzymes are important because they a. contain water b. speed up chemical reactions c. contain genetic material d. the cell maintain its shape 2 which term refers to the diffusion of water through a membrane a. osmosis b. engulfing c. active transport d. facilitated transport

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.