You Are Working with Salamander Embryos in the Early Gastrula

question 82

Multiple Choice

You are working with salamander embryos in the early gastrula stage and transplant cells destined to become neural tissue to a region that would normally form epidermis.As the embryo develops further,you find that the transplanted cells form epidermis instead of neural tissue.You repeat the experiment on a late-stage gastrula and find that as the embryo develops further,the transplanted cells form neural tissue.From these results,you can conclude that the cells being transplanted

• A) were differentiated prior to the time they were transplanted in each experiment.
• B) were determined to form neural tissue prior to the early gastrula stage.
• C) underwent morphogenesis between the early and late gastrula stages.
• D) became determined to become neural tissue between the early and late gastrula stages.
• E) differentiated into neural tissue between the early and late gastrula stages.

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Definitions:

Ratio

A mathematical expression that compares two numbers by division, indicating how much of one value there is compared to another.

Share Holdings

Ownership of a portion of a company through possession of its stock.

Lowest Terms

A fraction simplified to its most basic form, where the numerator and denominator are the smallest possible integers.

Ratio

A numerical ratio representing how often one number can be divided by another, showing either how many times one is included in the other or vice versa.