20.4 21.3 are the correct answers
Well what you have to do lol
Answer:
second one
Explanation:
the second one is aerobic respiration which creates alot of energy
Answer:
Cnidarians represent a more complex level of organization than Porifera. They possess outer and inner tissue layers that sandwich a noncellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion.
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The belt between Mars and Jupiter is mad of space rocks known as astroids. Hope that helps!
