Answer:
The ecosystems are different
Explanation:
Every ecosystem needs most of the types, such as producers and herbivours, but different animals need different climates, such as cacti need deserts, yet fish need water, they can't( Or shouldn't ) Be in the same ecosystem due to thier needs.
Collagen......
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I know that Penicillin is made from mold, and I think mold is a fungus but I'm not 100% positive.
Yes. At the top of the hill they have potential energy. while riding down the hill the bike will pick up speed.