Question

1. the digestive tract (also referred to as the gastrointestinal tract) includes the mouth, esophagus, stomach, small intestine, and large intestine. what level of organization is this an example of?

a cell
b organ
c tissue
d organ system

Explanation:

To determine the level of organization, we analyze each option:

• Option a (cell): A cell is the basic unit of life, not a group of organs like the digestive tract.
• Option b (organ): An organ is a single structure made of tissues, but the digestive tract consists of multiple organs (mouth, esophagus, stomach, etc.).
• Option c (tissue): Tissue is a group of similar cells, while the digestive tract has multiple organs, not just tissue.
• Option d (organ system): An organ system is a group of organs that work together to perform a specific function. The digestive tract includes multiple organs (mouth, esophagus, stomach, small intestine, large intestine) that work together for digestion, so it is an organ system.

Answer:

d. organ system