A Human Gastrula Is Composed of Three Cell Layers Stacked

question 78

True/False

A human gastrula is composed of three cell layers stacked on top of one another (like the layers of a sandwich). As the early cells within human embryos are incapable of migration, this tri-laminar disc is the result of mitotic cell division and not the active movement of cells.

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Definitions:

Calcium Chloride

A salt compound often used for ice melting, dust control, and as a desiccant because of its ability to absorb moisture.

Formula

A representation of the composition of molecules and compounds using symbols for the elements.

Snow Melting

The conversion of snow into water when the temperature rises, affecting ecosystems, water supplies, and climate models.

Elemental Symbol

A one- or two-letter notation derived from the name of an element, used as a shorthand representation in chemical equations and formulas.