The IUCN Defines the Term Extinct as Pertaining to a Species

question 6

Multiple Choice

The IUCN defines the term extinct as pertaining to a species that was alive in the wild in the

• A) past but no individuals remain alive today.
• B) year 1000 but no individuals remain alive today.
• C) year 1500 but no individuals remain alive today.
• D) year 1900 but no individuals remain alive today.

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Definitions:

Enteric Neurons

Neurons that govern the function of the gastrointestinal system, forming a part of the enteric nervous system.

Myenteric Plexus

A network of neurons located between the layers of the gastrointestinal tract, involved in regulating gut movement and secretion.

Muscularis

A layer of muscle in the walls of various organs, such as the digestive tract, responsible for movement and peristalsis.

Parotid Salivary Glands

The largest of the salivary glands, located near the ears, that produce saliva to aid in digestion and oral health.