40 Multiple-Choice Questions to Test Knowledge: inver

What is the defining characteristic of Ecdysozoa

• Bilateral symmetry

  
  

• Trochophore larvae

  
  

• Molted cuticle (ecdysis)

  
  

• Cilia for locomotion

  
  

Which of the following is NOT an Ecdysozoan phylum?

• Arthropoda

  
  

• Nematoda

  
  

• Mollusca

  
  

• Tardigrada

  
  

Ecdysozoans occupy which habitats?

• Freshwater only

  
  

•  Marine, freshwater, terrestrial, and parasitic environments

  
  

• Terrestrial exclusively

  
  

• nside hosts only

  
  

Armored Lobopods and Anomalocarids

What distinguishes armored lobopods from other Ecdysozoans?

• Jointed appendages

  
  

• Parasitic adaptations

  
  

• Development of cilia

  
  

• Lack of cuticle

  
  

During which era were anomalocarids most abundant?

• Paleozoic

  
  

• Mesozoic

  
  

•  Cenozoic

  
  

•  Precambrian

  
  

Why are fossils of armored lobopods rare?

• Short lifespans

  
  

• Lack of hard skeletons

  
  

• Exclusively terrestrial habitat

  
  

• Overpopulation

  
  

hich of these is NOT a characteristic of Arthropoda?

•  Jointed legs

  
  

• Striated muscles

  
  

• Radial symmetry

  
  

•  Exoskeleton of chitin

  
  

What distinguishes arthropods from other invertebrates?

• Segmented body and jointed appendages

  
  

• Radial symmetry

  
  

• Cilia on body

  
  

• Lack of segmentation

  
  

Arthropods have how many tagmata?

• One

  
  

• Two

  
  

• Three

  
  

• Four

  
  

Trilobites are characterized by:

• Three body lobes

  
  

•  Powered flight

  
  

• Aquatic parasitism

  
  

• Two tagmata