All Organisms Are Composed Mostly of All but Which of the Following

question 18

Multiple Choice

All organisms are composed mostly of all but which of the following?

• A) oxygen
• B) nitrogen
• C) calcium
• D) carbon
• E) hydrogen

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Definitions:

Germinal

The initial stage of prenatal development that spans from conception to the first two weeks, characterized by rapid cell division and the establishment of the embryo.

Embryonic

Pertaining to the earliest stage of development in multicellular organisms, following fertilization and prior to becoming a fetus.

Outermost Layer

The external surface or the topmost layer of an object or entity.

Ectoderm

The outermost layer of cells or tissue of an embryo in early development, from which the skin, brain, and nervous system develop.