Phylum Arthropoda to Protochordates

What is the largest phylum in the animal kingdom?

• Porifera

• Mollusca

• Arthropoda

• Chordata

Which subphylum do insects belong to?

• Arthropoda

• Hexapoda

• Mollusca

• Crustacea

What is the defining characteristic of arthropods?

• Endoskeleton made of chitin

• No skeleton at all

• Exoskeleton made of calcium

• Exoskeleton made of chitin

Name one example of a class under the phylum Arthropoda.

• Mollusca

• Chordata

• Insecta

• Arachnida

What is the common name for the class Arachnida?

• Arachnids

• Arachnidum

• Arachnidus

• Arachnidia

Which phylum includes animals with a notochord at some stage of their development?

• Chordata

• Mollusca

• Arthropoda

• Cnidaria

What is the name of the subphylum that includes tunicates and lancelets?

• Urochordata

• Arthropoda

• Echinodermata

• Chordata

What is the function of a notochord in chordates?

• Regulation of body temperature

• Digestion of food

• Production of hormones

• Structural support and defining body axis

Name one example of a chordate that is not a vertebrate.

• Lancelets

• Hagfish

• Tunicates

• Amphioxus

What is the defining feature of vertebrates?

• Backbone or spinal column

• Tentacles

• Gills

• Exoskeleton