Humans adapt to Earth. They can breathe the oxygen in the area where they live in. They have feet for walking since they don't fly or swim all the time, we have gravity. We have hands so we can pick up things like food, that we need to eat. We get our nutrients from food so we have a mouth to eat from. Our ears hear so we can communicate with each other. Our eyes see because we need a way to know where we are going.
The alien adapted to its planet. It has a nose with a sucker to suck up the nutrient-rich mud that it needs to survive. It has alligator-like feet to push through the mud and muck. It's eye helps it to see predators coming. It has adapted well to it's muddy planet.
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•I think we have different cells from the aliens. I think so because we are so different, they don't have legs and we do. We have ears and they don't.
•My alien has cells that help by making up it's nose that sucks up the nutrient rich mud that it needs to survive. It also has cells that make the helpful alligator-like feet. It evolved with alligator-like feet because it needed a way to move easily through the muck. It also has cells that make the eye that can see clearly, which is helpful for spotting predators.