Which of the Following Could Be Considered the Most Recent

question 28

Multiple Choice

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 armoured, 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

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Definitions:

Absent Objects

Concepts or items that are not physically present but can still have effects or be represented in thought.

Motor Abilities

The physical skills related to movement and coordination, including gross and fine motor skills.

Object Permanence

The concept that objects remain in existence even when they're not being perceived through sight, sound, touch, smell, or any other senses.

Object Permanence

The understanding that objects continue to exist even when they cannot be seen, heard, or otherwise sensed.