David created a shoe box model of a grassland. He placed biotic factors in first but needs to add some abiotic factors. Which two abiotic factors could he add? A. Trees, B. Sunlight, C. Insects, D. Flowers, E. Humans, F. Water.

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.