A scientist is studying three different layers of sedimentary rock to learn how a particular mammal species has changed over time. In the rock layer that is closest to the Earth's surface, fossilized individuals of this species have hooves on both their front feet and their back feet. In the layer below, fossilized individuals have three padded toes on both their front feet and their back feet. In the bottom layer, fossilized individuals have four padded toes on their front feet and three padded toes on their back feet.Based on this information, individuals of this species today most likely have A. four padded toes on their front feet and three padded toes on their back feet. B. hooves on both their front feet and their back feet. C. three padded toes on both their front feet and their back feet. D. four padded toes on both their front feet and their back feet.
Question
A scientist is studying three different layers of sedimentary rock to learn how a particular mammal species has changed over time. In the rock layer that is closest to the Earth's surface, fossilized individuals of this species have hooves on both their front feet and their back feet. In the layer below, fossilized individuals have three padded toes on both their front feet and their back feet. In the bottom layer, fossilized individuals have four padded toes on their front feet and three padded toes on their back feet.Based on this information, individuals of this species today most likely have A. four padded toes on their front feet and three padded toes on their back feet. B. hooves on both their front feet and their back feet. C. three padded toes on both their front feet and their back feet. D. four padded toes on both their front feet and their back feet.
Solution
Based on the information provided, the most likely answer is B. hooves on both their front feet and their back feet. This is because the layer of rock closest to the Earth's surface, which would be the most recent, contains fossils of the species with hooves on both their front and back feet. This suggests that the most recent evolutionary adaptation of this species is having hooves on both sets of feet.
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