A Skull with a Foramen Magnum (Which Positions the Skull

question 1

Multiple Choice

A skull with a foramen magnum (which positions the skull in front of the body) belongs to:

• A)an individual that is fully bipedal,such as a human.
• B)an individual that is fully quadrupedal,such as a dog.
• C)an individual that is fully quadrupedal,such as a human.
• D)none of the above (this trait is only observed in prosimians).

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Definitions:

Ray-Finned Fish

Aquatic vertebrates characterized by fins supported by bony spines or rays, constituting the largest group of fish.

Coelacanth

An ancient order of fish thought to be extinct for millions of years until a living specimen was found in 1938, known for its lobed fins.

Extraembryonic Membranes

Tissue layers formed outside the embryo that provide protection, nutrition, waste removal, and gas exchange for the developing fetus.

Embryos

Early developmental stages of multicellular organisms following fertilization, before becoming a fetus in humans or a hatchling in egg-laying species.