In terms of human evolution, the sagittal crest was usually more pronounced and larger in older and robust species compared to younger or gracile species.
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Answer:
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Explanation:
1. Amphibians can breathe through their skin while humans cannot.
2.Frogs and other amphibians respire by alternatively dilating and contracting the buccopharyngeal cavity, while humans cannot
3.Some Amphibians such as, the larval amphibians respire in water, while it isn't possible for humans to do such
4.Humans only have one form of respiration, while Amphibians have multiple.
5.The lungs of amphibians are simple saclike structures that internally lack the complex spongy appearance of the lungs of birds, mammals, and humans
The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth's total volume.
I think it’s the second option. There is a ph scale attached below to explain this. Hope it helps.
