Which Statement Best Describes the Importance of Banded Iron Formations

question 15

Multiple Choice

Which statement best describes the importance of banded iron formations?

• A) The rust layers in them serve as evidence for the presence of rocks on early Earth.
• B) The rust layers in them serve as evidence for the presence of iron on early Earth.
• C) The rust layers in them serve as evidence for the fall of atmospheric oxygen on early Earth.
• D) The rust layers in them serve as evidence for the rise of atmospheric oxygen on early Earth.

---

Definitions:

Medullary Cavity

The central cavity of bone shafts where red bone marrow and/or yellow bone marrow (fat) is stored.

Osteoporosis

A condition characterized by weakened bones that are more prone to fracture, often resulting from hormonal changes or deficiency of calcium or vitamin D.

Oversecreting

The condition wherein glands produce and release excessive amounts of hormones or other substances, potentially leading to various health issues.

Cancer Cells

Abnormal cells that divide uncontrollably and can invade nearby tissues or spread to other parts of the body.