A good scientific hypothesis is based on existing evidence and leads to testable predictions. What hypothesis did the paleontologists who discovered Tiktaalik test? What evidence did they use to predict where they would find fossils of transitional forms?

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Accepted Answer

Hello, everyone and welcome to today's video. So which of the following is one of the features of tikal, which is a bony fish, a very ancestral type of fish that made it an intermediate model between terrestrial and aquatic forms. So as we go over our answer choices, remember that we're looking for the characteristics that make it a perfect intermediate between terrestrials and aquatic forms. So it has to apply to both. Let's begin by answer choice. B it had a larger brain that characterized terrestrial organisms here in this question, we're only talking about a characteristic that would benefit terrestrial organisms or that is characterized by terrestrial organisms. So we're going to cancel it out because it does not include the aquatic form. Then we have seat, it had tails that helped propel it in water. Again, this is only going to apply to aquatic organisms. This is not an intermediate feature between aquatic and terrestrial forms. We're going to cancel it out and we had the lungs that are adapted to anoxic waters. Here. Again, we're only talking about aquatic organisms. So we're going to cancel this out. So when we look at answer choice, a it had paddle like fore limbs that were partly thin and partly foot. This fin is going to help with movement in the water. Well, this food is going to help with movement in land. So it makes it the perfect intermediate between aquatic and terrestrial forms. So this is the characteristic them having these four limbs that were partly thin and poorly food that allow them to become so effective in between the terrestrial and aquatic forms. So we're going to highlight answer choice a as a correct answer to our question, I really hope this video helped you and I hope to see you on the next one.

A good scientific hypothesis is based on existing evidence and leads to testable predictions. What hypothesis did the paleontologists who discovered Tiktaalik test? What evidence did they use to predict where they would find fossils of transitional forms?

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Key Concepts

Hypothesis Formation

Transitional Fossils

Evidence-Based Prediction