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Pavlova-9 [17]
3 years ago
6

Which of the following could be considered the most recent common ancestor of living tetrapods? a) a sturdy-finned, shallow-wate

r 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
Biology
1 answer:
tensa zangetsu [6.8K]3 years ago
8 0

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

Explanation:

An ancestor - An earlier type of a species at any distant time — a progenitor.

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.

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Answer:

The correct answers are:

Analogous structures do not indicate a common ancestor. Analogous structures have the same function but a different structure. An example of an analogous structure is the wing of a bat and a butterfly.

Explanation:

Analogous structures are the structures that have a similar function in various organisms but their anatomic structure is different from one another in reality. Analogous structures are do not indicate a common ancestor.

An analogous structures example is the wings of the bat and butterfly as they are both used for flying but their structure is different anatomically from one another.

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