One of the difference is that the ice cube is solid and gas is not.
All the energy (Kcal) on the earth is from the sun. plants absorb the energy then an animal/organism will consume it then the animal will use 10% of the energy then some will eat that animal and process will continue but the less the energy there is the more the next animal will eat
The nucleus of the cell divides
The answer is sea stars. Sea stars can then push their stomachs out of the body while inserting it into the prey thus the food is being digested externally. Echinoderms are having 5 or at times multiple of 5 arms. Their shell is made of calcium carbonate.