All of the following are recycled in the biosphere EXCEPT... carbon
energy
nitrogen
phosphorus

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

straight or amphibians are homeothermic to thermal

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle