The Outermost Layer of the Embryo Is Called the

question 87

Multiple Choice

The outermost layer of the embryo is called the

• A) mesoderm, which produces the digestive system.
• B) cytoderm, which produces the circulatory system.
• C) endoderm, which produces the reproductive system.
• D) ectoderm, which produces the nervous system.

---

Definitions:

Primitive Atmosphere

Describes the early Earth's atmosphere, which lacked oxygen and was composed mainly of carbon dioxide, water vapor, nitrogen, and inert gases.

Methane

A potent greenhouse gas with a significant impact on global warming, primarily produced from decomposition of organic matter and the digestive processes of certain animals.

Carbon Dioxide

A gas that has no color or smell, created when carbon and organic compounds burn and during breathing. It exists naturally in the atmosphere and is taken in by plants during the process of photosynthesis.

Ultraviolet Radiation

A form of electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays, capable of causing skin burns and can play a beneficial role in vitamin D production.