Refer to the Figure Showing a Stage of Gastrulation in the Frog

question 174

Multiple Choice

Refer to the figure showing a stage of gastrulation in the frog. If a piece of ectoderm destined to be epidermis (outer layer of skin) is removed from a gastrula of the stage seen in the figure and put into a location destined to be neural tissue in a similarly aged gastrula, which result is the most likely?

• A) The transplanted tissue will develop into neural tissue.
• B) The transplanted tissue will develop into dermis.
• C) The transplant will be rejected.
• D) The transplanted tissue will develop into epidermis.
• E) A second complete embryo will form belly-to-belly with the recipient of the transplant.

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