Experiments on Selective Adhesion Between Ectoderm, Mesoderm, and Endoderm Derived

question 65

Multiple Choice

Experiments on selective adhesion between ectoderm, mesoderm, and endoderm derived from amphibian embryos demonstrated that ____.

• A) ectoderm cells have positive affinity for mesoderm cells, but negative affinity for endoderm cells
• B) ectoderm cells have negative affinity for mesoderm cells, but positive affinity for endoderm cells
• C) mesoderm cells have negative affinity for endoderm and ectoderm cells
• D) ectoderm cells have positive affinity for both endoderm and mesoderm cells
• E) endoderm cells have positive affinity for both ectoderm and mesoderm cells

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Definitions:

Income

Financial earnings received by an individual or entity, typically measured over a set period and derived from work, investments, or other sources.

Perfect Equality Line

In the context of income distribution, a theoretical line indicating equal income or wealth distribution among all participants.

Points

In various contexts, a measurement or scoring method used to quantify achievements, progress, or certain financial transactions, such as credit card rewards.

Income Mobility

Movement of individuals and families either up or down income-distribution rankings when comparisons are made at two different points in time. When substantial income mobility is present, a person’s current position in the rankings will not be a very good indicator of what his or her position will be a few years in the future.