The ____ are the Most Diverse Animal Group

Question

The ____ are the most diverse animal group.  
A) vertebrates
B) insects
C) humans
D) protozoans
E) mollusks

Accepted Answer

Insects are the most diverse animal group and make up approximately 80% of all known animal species. They have a wide variety of characteristics and adaptations that allow them to survive in almost every habitat on Earth. While vertebrates and mollusks are also diverse groups, they have a much smaller number of species in comparison to insects. Humans are not an animal group, and protozoans are a diverse group of unicellular organisms but do not have as many species as insects.