How does an ecosystem change during succession? A. It has fewer species.
B. It has more biodiversity.
C. It becomes less stable.
D. It becomes smaller.

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service