A Complication of Molecular Clock Studies Is That

question 11

Multiple Choice

A complication of molecular clock studies is that

• A) DNA and proteins appeared in life at about the same time.
• B) genes mutate at different rates.
• C) DNA is not often preserved in fossils.
• D) some species are more highly evolved than others.
• E) some primate species do not have a Y chromosome.

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Definitions:

Fovea

A tiny pit located in the macula of the retina that is responsible for sharp central vision.

Opsin

A group of protein molecules found in photoreceptor cells of the retina that play a crucial role in the phototransduction cascade of vision.

Retinal

Refers to the thin layer of tissue that lines the back of the eye on the inside, primarily responsible for receiving light and converting it into neural signals for visual recognition.

Brightly Lit

Having abundant light or illumination, often enhancing visibility or creating a specific atmosphere.