Which of the Following Statements About Bird Evolution Is NOT

question 14

Multiple Choice

Which of the following statements about bird evolution is NOT correct?

• A) Scientific studies have revealed so many errors in the traditional dinosaur-bird evolutionary tree that none of it is considered useful to understanding the evolution of birds and flight.
• B) Scientific studies of the Xiaotingia fossil caused scientists to adjust the traditional dinosaur-bird evolutionary tree.
• C) Scientific comparisons of Archaeopteryx and Xiaotingia fossils caused scientists to adjust the traditional dinosaur-bird evolutionary tree.
• D) It is important to understand the dinosaur-bird evolutionary tree in order to have a better understanding of how flight evolved.

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Definitions:

G Protein-linked Receptors

A large family of cell surface receptors that detect molecules outside the cell and activate internal signal transduction pathways and cellular responses.

Transmembrane Proteins

Proteins that span the entirety of a cell membrane, facilitating a variety of functions including signaling and transport across the membrane.

Signaling Molecule

Chemicals that transfer information from one cell to another, playing a key role in biological processes and cellular responses.

Scaffold Proteins

Proteins that mediate the assembly of other proteins into complex multi-enzyme units, facilitating signal transduction and other cellular processes.