The last one, the planets formed at the same distance from the sun.
<span>contractile vacuole
Contractile vacuoles are organelles that are responsible for excretion function. They perform osmoregulation which manages wastes, water and other needed materials in the cell. They are found in some prokaryoric organisms like the algae, protists, amoeba and other unicellular organisms.
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Answer:
Reptiles, like early dinosaurs.
I believe 6CO2 is the answer
