The last one, the planets formed at the same distance from the sun.
Plants and animals are multicellular (which means many) and Unicellular means only one cell. Please mark as brainliest answer if it helped
These structures are called Vestigial structures, they resemble structures from the organism's ancestors, but don't have a real purpose for them now.
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Photosynthesis and respiration are reactions that complement each other in the environment.