Figure 20-2 in the Accompanying Figure, Note the Variation

question 130

Multiple Choice

Figure 20-2 In the accompanying figure, note the variation in these closely related birds. What does this illustrate?

• A) hybridization
• B) macroevolution
• C) hybrid inviability
• D) adaptive radiation
• E) allometric radiation

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Definitions:

Secondary Structure

The secondary structure of proteins involves the local folding or coiling of the peptide chain into structures such as alpha-helices and beta-sheets, primarily stabilized by hydrogen bonds.

Alpha-Helical

Pertaining to the alpha-helix structure, a type of secondary structure of proteins, characterized by a right-handed coil.

Beta-Pleated Sheet

A type of secondary structure found in proteins wherein the backbone is extended into a zigzag shape and strands are connected by hydrogen bonds.

Proteins

Large biomolecules consisting of one or more long chains of amino acid residues, crucial for the structure and function of living cells.