_______________ Are Widely Dispersed and Don't Often Occur in Concentrations

question 111

Short Answer

_______________ are widely dispersed and don't often occur in concentrations that make their mining commercially viable.

---

Definitions:

Embryonic Germ Layers

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

Endoderm

The innermost of the three primary germ layers in the early embryo that gives rise to the lining of the digestive and respiratory systems.

Mesoderm

A middle layer of cells or tissues in an embryo from which many organs and tissues such as muscle, bone, and blood vessels develop.

Subcutaneous Adipose Tissue

A layer of fat stored directly under the skin, serving as insulation and energy storage.