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Animal Body Plans and Symmetry (Grade 10)

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Animal Body Plans and Symmetry

1. 
What is meant by an organism being asymmetrical?



 
2. 
What is meant by having radial symmetry?



3. 
Which of these phyla has organisms with asymmetrical symmetry?
  1. Porifera (sponges)
  2. Cnidarians
  3. Nematoda
  4. Platyhelminthes
 
4. 
Which of these phyla has organisms with radial symmetry?
  1. Porifera (sponges)
  2. Cnidarians
  3. Nematoda
  4. Platyhelminthes
  5. Annelida
  6. Echinodermata
  7. Mollusca
  8. Arthropoda
5. 
What does it mean when an animal is said to have bilateral symmetry?



 
6. 
Vertebrates typically have                 symmetry.
  1. radial
  2. asymmetry
  3. bilateral
  4. biradial
7. 
Which of these phyla has organisms with bilateral symmetry?
  1. Echinodermata
  2. Cnidaria
  3. Chordata
  4. Porifera
 
8. 
Some species have a particular type of radial symmetry called pentaradial symmetry. What is meant by this classification?



9. 
Which of these phyla contains organisms with pentaradial symmetry?
  1. Chordata
  2. Arthropoda
  3. Platyhelminthes
  4. Echinodermata
 
10. 
Many organisms do not exhibit symmetry when an external plane is drawn, cutting the organisms into front and back halves. Which two body positions are created when this occurs?
  1. medial and midsagittal
  2. posterior and inferior
  3. lateral and sagittal
  4. anterior and posterior
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