Which of the following could be considered the most recent common ancestor of living tetrapods? a) a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebrates b) an armored, jawed placoderm with two pairs of appendages c) an early ray-finned fish that developed bony skeletal supports in its paired fins d) a salamander that had legs supported by a bony skeleton but moved with the side-to-side bending typical of fishes

A tetrapod is any vertebrate with four limbs. It includes any vertebrate (such as birds or snakes) that have evolved from early tetrapods — especially all members of the superclass Tetrapoda.

The presence of bones that support the appendages in Lobe – fin fish were found to be similar to the categorical skeletal supports found in the limbs of sample tetrapods. The sub class crossopterygii includes the Lobe – fin fish, which is seen as one of the recent common ancestor of living tetrapod today.

batolisis batolisis · Answer 2 · 2022-03-29T16:02:20+02:00

What could be considered the most recent common ancestor of living tetrapods is :

( A ) A sturdy-finned, shallow-water lobe fin whose appendages had skeletal supports similar to those of terrestrial vertebrates.

Tetrapods

Tetrapods are vertebrates with four limbs they include all land mammals such as mammals, birds and amphibians. also some early tetrapods that have evolved and adopted the aquatic life includes dolphins and whales.

The bones that support the appendages resembling those of terrestrial vertebrates makes the Lobe – fin fish the most recent common ancestor of living tetrapods.

Hence we can conclude that What could be considered the most recent common ancestor of living tetrapods is : ( A ) A sturdy-finned, shallow-water lobe fin whose appendages had skeletal supports similar to those of terrestrial vertebrates.

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