What Do Biologists Cite as the Primary Benefit of the Evolution

question 16

Multiple Choice

What do biologists cite as the primary benefit of the evolution of a coelom in animals?

• A)the hydrostatic skeleton,allowing greater range of motion
• B)a more efficient digestive system,in the form of a tube-within-a-tube
• C)cephalization and the formation of a cerebral ganglion
• D)the subsequent evolution of segmentation

---

Definitions:

Pluripotent Stem Cells

Cells that have the potential to differentiate into any type of cell in the body but not extraembryonic tissues.

Embryonic Cells

Undifferentiated cells in the embryo that have the potential to develop into various types of tissues and organs.

Basement Membrane

A thin, dense layer of extracellular matrix that underlies the epithelium and separates it from underlying tissue.

Epithelium

A layer of cells covering the body surfaces and lining internal organs and various glands, serving protective, sensory, and absorptive functions.