Chapter 32 Review

1
Chapter 32 Review

• Overview of Animal Diversity

2

• List the 9 general features all animals share.
• What are the 5 key transitions observed in animal
  evolution?
• Which phylum has a cellular-level of
  organization?
• Explain the difference between radial vs.
  bilateral symmetry. Give a phylum that has each
  type of symmetry.
• What are the 3 germ layers starting from outside
  to inside?
• What are the 3 body cavities animals may possess?
  Define each body cavity and give an example of a
  phylum that has each body cavity

3

• What is the difference between a closed vs.
  opened circulatory system? What phyla have an
  open circulatory system? What phylum have a
  closed circulatory system?
• What are the two types of development patterns?
  What develops first in each? Give examples of
  phyla that have the types of development.
• Explain the difference between spiral vs. radial
  cleavage.
• Explain the difference between indeterminate vs.
  determinate growth.

4

• What are the two advantages to segmentation?
• Zoologists divide the Kingdom Animalia into 2
  main branches. What are the 2 branches? What
  phyla are included in each branch?
• Fossil evidence reveals a great diversity of
  animals exploded during what geological time
  period?
• What is molecular systematics? What is this
  approach doing to animal phyla?