<span>Intracellular digestion takes place in animals without a digestive tract, in which food items are brought into the cell for digestion. Extracellular digestion is a process in which animals feed by secreting enzymes through the cell membrane onto the food.</span><span>
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Answer:
O A Single-celled organisms are simple, while multicellular organisms are complex,
A signal to reabsorb more water and salt. Have a good day =D
A all particlea stop moving then there will be no movement so it will be absolute 0