1. which statement is the best description of an ecosystem? (points : 3) an ecosystem is made up of individuals of the same species in the same place. an ecosystem grows exponentially unless a factor limits it. an ecosystem is a large tract of land that includes many species. an ecosystem is a community and its surrounding nonliving environment,

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands