If the process illustrated in the diagram is interrupted by a chemical at point x, there would be an immediate effect on the release of
(1) chlorophyll
(2) nitrogen
(3) carbon dioxide
(4) oxygen

is this for the e2020 class

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

a- all cells come from pre-existing cells