The Appearance of Pax-6 in All Animals with Eyes Can

question 21

Multiple Choice

The appearance of Pax-6 in all animals with eyes can be explained in multiple ways.Based on the information given,which explanation is most likely?

• A)Pax-6 in all of these animals is not homologous;it arose independently in many different animal phyla due to intense selective pressure favoring vision.
• B)The Pax-6 gene is really not one gene.It is many different genes that,over evolutionary time and due to convergence,have come to have a similar nucleotide sequence and function.
• C)The Pax-6 gene was an innovation of an ancestral animal of the early Cambrian period.Animals with eyes or eyespots are descendants of this ancestor.
• D)The perfectly designed Pax-6 gene appeared instantaneously in all animals created to have eyes or eyespots.

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Definitions:

Terra Nullius

A legal doctrine that justified the annexation of land on the basis it was "owned by no one," notably used by European settlers in places like Australia.

Disproportionate

Lacking in proportion, balance, or equivalence, often used to describe uneven or unfair distribution of resources, representation, or opportunities.

Establishment

An influential social or political group or institution, often considered part of the mainstream power structure, holding significant sway in societal decisions and norms.

Labor

The effort by humans to produce goods or services in exchange for wages or other forms of compensation.