i think the reason why some fish did not already exist today is because?
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i think the reason why some fish did not already exist today is because?
i think the reason why some fish did not already exist today is because?
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Answer:
There are countless ecological opportunities under water, which is why fish still exist. When the earliest ancestors of modern amphibians left the water, they found many new opportunities on land. As amphibians and other land creatures diversified, however, fewer and fewer opportunities existed for newcomers