[TED ed] How turtle shells evolved... twice - Judy Cebra Thomas
Video True or False Statements: 1. Odontochelys semitestacea is an ancestor of the turtle. 2. The turtle's two shells develop together while the turtle is still an embryo. 3. Turtle embryos look very different from those of other reptiles, birds, and mammals. 4. The carapacial ridge guides the formation of the lower part of the turtle's shell. 5. The ribs move downwards to make a regular rib cag..
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2023. 6. 18. 22:59
