Fossils Have Been Discovered for About How Many Species

question 18

Multiple Choice

Fossils have been discovered for about how many species?  

• A) 10,000
• B) 50,000
• C) 100,000
• D) 150,000
• E) 250,000

---

Definitions:

Osteomyelitis

An infection of bone, which can lead to bone damage and loss if untreated.

Periosteum

The dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.

Endosteum

A thin, vascular membrane covering the internal surfaces of bones.

Diaphysis

The main or midsection (shaft) of a long bone, which is typically hollow and contains marrow.