A Researcher Studying the Development of the Eye in Xenopus

question 159

Multiple Choice

A researcher studying the development of the eye in Xenopus (the clawed frog) is testing her hypothesis that the optic vesicle induces head ectoderm to form the lens of the eye.When she removes the optic vesicle on one side of the embryo, no lens forms on that side, indicating the optic vesicle is necessary for lens formation.What additional experimental result must she obtain to show that the optic vesicle is also sufficient for inducing lens formation?

• A) The lens forms when a permeable barrier is placed between the optic vesicle and the lens-forming tissue.
• B) The lens does not form when an impermeable barrier is placed between the optic vesicle and the lens-forming tissue.
• C) A lens forms when the optic vesicle is placed next to tissue that does not normally form a lens.
• D) A lens does not form when the optic vesicle is placed next to tissue that does not normally form a lens.
• E) A lens forms when the optic vesicle is recombined with lens-forming tissue.

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Definitions:

Impression

In a medical or psychological context, it refers to an initial understanding or assessment of a condition before detailed analysis.

Investigate

The process of carrying out systematic inquiries to discover and examine the facts of an issue or case, often to resolve a problem or answer a question.

Medications

Substances used for medical treatment, especially in the form of drugs or pills.

Prescribed Drugs

Medications that are legally dispensed and recommended by healthcare professionals for specific health conditions.