21. To reduce the dependence on diffusion, multicellular organisms have A. Reduced cell size and number of cells
B. Developed thinner cell membranes
C. Developed other internal transport systems
D. All of the above

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing