All the different organisms interacting in a pond make up..?

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

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

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex