What causes evolution?

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

What happens when the cell copies its chromosomes

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