Which term refers to the early embryo's formation of distinct layers called germ layers?

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Multiple Choice

Which term refers to the early embryo's formation of distinct layers called germ layers?

Explanation:
The idea being tested is how the embryo organizes itself into specialized layers early in development. The term that describes this arrangement is germ layers. After fertilization, the embryo forms three primary germ layers—ectoderm, mesoderm, and endoderm—which later differentiate into all tissues and organs of the body. The other terms refer to different concepts: the zygote is the fertilized egg, the blastocyst is an early stage before implantation, and the endometrium is the lining of the uterus.

The idea being tested is how the embryo organizes itself into specialized layers early in development. The term that describes this arrangement is germ layers. After fertilization, the embryo forms three primary germ layers—ectoderm, mesoderm, and endoderm—which later differentiate into all tissues and organs of the body. The other terms refer to different concepts: the zygote is the fertilized egg, the blastocyst is an early stage before implantation, and the endometrium is the lining of the uterus.

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