In a solid the particles are very tightly packed and can’t move around much whereas in a liquid they are touching but can move around a bit. Liquids can also flow/pour
Answer:
I'd say an exoskeleton.
Explanation:
My main reason for saying this is because bugs with exoskeletons survive much better than bugs with endoskeletons or (surprise surprise) no skeletons. If your skeleton is outside your body, it protects everything inside you. Endoskeletons merely help hold you together.
Answer:
carbon is a waste products for a cell
C. for it to be equal there has to be random mating