The Figure Shows Two Hypotheses About Evolutionary Relationships Among Aquatic

question 33

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The figure shows two hypotheses about evolutionary relationships among aquatic birds. The phylogeny in (A) is based on data from morphological characters and in (B) from DNA sequence data. What is the reason for the differences between these phylogenies? What could you do to resolve the differences? A


B

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Definitions:

Corpora Quadrigemina

A structure in the midbrain comprising four colliculi (two superior and two inferior) that are involved in visual and auditory processes.

Cerebral Aqueduct

A narrow channel located in the midbrain that connects the third and fourth ventricles of the brain, allowing the flow of cerebrospinal fluid.

Cerebral Peduncles

Structures located at the base of the brain, containing nerve tracts that connect the cerebrum with the brainstem, cerebellum, and spinal cord.

Optic Chiasma

The Optic Chiasma is the X-shaped structure formed at the point where the optic nerves cross over each other, located at the base of the brain.