The Next Questions Refer to the Following Table, Which Compares

question 19

Multiple Choice

The next questions refer to the following table, which compares the % sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (e.g., Intron I is the one closest to the promoter) . The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.
% Sequence Homology

-Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?

• A) Intron I
• B) Exon I
• C) Intron VI
• D) Exon V

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Definitions:

Anticompetitive Effect

A situation or action that harms competition in a market, often by creating barriers to entry or monopolizing a sector.

Foreclosed

A legal process by which a lender takes possession of property used as collateral for a loan that has not been repaid according to the terms of the mortgage or deed of trust.

Antitrust Laws

Laws designed to protect trade and commerce from abusive practices such as monopolies, price fixing, and other unfair business practices.

Oligopolistic Structure

A market structure characterized by a small number of large firms dominating the market, often leading to limited competition.