What Has Only a Single Value of Each Attribute of an Entity

question 20

Multiple Choice

What has only a single value of each attribute of an entity?

• A)single-valued attribute
• B)multivalued attribute
• C)null-valued attribute
• D)All of these are correct.

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Definitions:

Ectoderm

The outermost layer of cells in the developing embryo, giving rise to the nervous system and skin.

Blastocyst Differentiation

The process during early embryonic development where a blastocyst forms distinct cell layers that will develop into various organs and tissues.

Zygote

A single cell formed through fertilization.

Implantation

The stage of pregnancy at which the embryo attaches to the wall of the uterus to begin development.