What Characteristics Separate the Class Mammalia from Other Animals in the Phylum

question 6

Multiple Choice

What characteristics separate the Class Mammalia from other animals in the phylum Chordata?

• A) bipedal locomotion and an upright stance
• B) being heterotrophic and multicellular
• C) dorsal tubular nerve cords and notochords
• D) vertebrates with hair and mammary glands
• E) developed brain and tool use

---

Definitions:

Screw Size

Refers to the nominal diameter, thread pitch, and length specified for screws, crucial for compatibility and strength in assemblies.

Reefer

A refrigeration trailer.

Trucking Industry

The sector of the economy focused on the transportation of goods and materials over land, primarily using large vehicles like trucks.

Refrigerated Trailer

A temperature-controlled trailer used in the transportation of perishable goods to maintain freshness by keeping them cold or frozen.