No they don't
For example humans. Technically humans are place below a wild predators such as sharks in trophic levels.
But the fact is we can eat sharks. So , organisms don't always stay in the same level
Atomic mass is determined by the number of protons plus the number of neutrons
Well the insects eat the plant and the small animals eat the insects and so on.if the insects die the food chain is broken.
Answer:
hmm ffom what i know, mitsuki is artificialy made by orochimaru hence why we can make multiple mitsuki. and as for kawaki, hes a normal boy who was experimented on by jigen as a possible vessel if im not mistaken