<u><em>Fish and mammals are related, even though adult fish and adult mammals do not look alike.</em></u>
Explanation:
Adult fish and adult mammals look very different. But the embryos of fish and mammals share a number of similarities. So, Mariam can conclude that fish and mammals are related, even though adult fish and adult mammals do not look alike.
I realized that the fish and mammals don't look alike but their embryos do so <u><em>Fish and mammals are related, even though adult fish and adult mammals do not look alike.
</em></u><em>Hope this helps if it does give it a thumbs up and a heart so I know it's right if it's wrong tell me what it was!!</em>
