An Investigation That Tracks Groups of Children of Different Ages

question 78

Multiple Choice

An investigation that tracks groups of children of different ages over a period of time,usually a few years,is called a(n)

• A) extended observation.
• B) sequential study.
• C) longitudinal study.
• D) cross-sectional observation.

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Definitions:

Primary Germ Layers

The three initial layers of cells (ectoderm, mesoderm, and endoderm) in the early embryo from which all bodily tissues and organs develop.

Digestive Organs

Organs involved in the digestion process, including the mouth, esophagus, stomach, liver, gallbladder, pancreas, intestines, rectum, and anus.

Respiratory Organs

Organs involved in the process of breathing, including the nose, throat, larynx, trachea, bronchi, and lungs.

Extraembryonic Membrane

Membranes that support the development of the embryo, such as the amnion and chorion.