Question

Which evidence supports the hypothesis that four-limbed animals came from fish? select all that apply. select all that apply. fossil evidence shows there have always been four-limbed animals on earth. dna analysis shows that fish are tetrapods' closest relatives. the fossil record shows more and more tetrapod-like fish before the appearance of tetrapods about 365 million years ago. fish and four-limbed animals have very similar embryos. both fish and four-limbed animals are vertebrates?

Answer 1

All these options apply except for fossil evidence. This is because according to fossils records tertrapods arose in the Devonian period.

DNA analysis shows that fish are tetrapods’ closest relatives. It has been confirmed by genetic tests that out of the 30,000 types i.e. The closet relative of tetrapods is the lungfish.

Both fish and four-limbed animals are vertebrates.

According to the ‘drying pond’ hypothesis, when water became scarce in the, Devonian, period, tertrapods arose from fishes, and this is based on the fossil record showing more and more tetrapod-like fish before the appearance of tetrapods about 365 million years ago.

Fish and four-limbed animals have very similar embryos. As both fish and human embryos have gill slits.