Different Results Are Achieved When an Eight-Cell Sea Urchin Embryo

question 92

Multiple Choice

Different results are achieved when an eight-cell sea urchin embryo is bisected horizontally as opposed to when it is bisected vertically. This observation supports which of the following statements?

• A) Cellular determinants are equally distributed in the embryo.
• B) Differentiation has occurred by the eight-cell stage.
• C) Inducers have determined cell fate.
• D) Polarity exists in the embryo by the eight-cell stage.
• E) None of the above

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Definitions:

Support Test

Criteria used by the IRS to determine if an individual can claim another person as a dependent based on financial support provided.

Qualifying Child

A dependent who meets certain IRS criteria related to relationship, age, residency, and support, allowing the taxpayer to claim various tax benefits.

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