Question

1. List the phylum in which most taxa have a foot, visceral mass, and a mantle. 2. Identify the structures on the squid. a. b. c. d. 3. An octopus is one of the few of its phylum that does not have a 4. Bivalves move water through their bodies to do what? and 5. Nudibranchs, commonly known as sea slugs, belong to the phylum Mollusca and the class 6. The mollusks on the right belong to the phylum Mollusca and the class: 7. a. Describe the characteristics that nematodes and arthropods have in common. (Circle the correct term) Nematodes and arthropods... have: bilateral symmetry radial symmetry are considered: protostomes deuterostomes have an: endoskeleton exoskeleton 8. b. Describe characteristics that nematodes and arthropods do not have in common. (Circle the correct term) Body cavity Nematodes are: acoelomates pseudocoelomates coelomates Arthropods are: acoelomates pseudocoelomates coelomates Segmentation: Nematodes have segmentation: yes no Arthropods have segmentation: yes no 9. The phylogenetic position of nematodes has varied due to its physical features, although molecular evidence supports the current position. Nematodes were once thought to be sister taxa to flatworms and even earthworms, due to their vermiform shape and other characteristics. Compare and contrast nematodes to two other phyla we have investigated. Flatworms Annelids One characteristic this phylum has in common with nematodes (other than vermiform shape): One characteristic that differentiates nematodes from this phylum:

1. List the phylum in which most taxa have a foot, visceral mass, and a mantle.
2. Identify the structures on the squid.
a.
b.
c.
d.
3. An octopus is one of the few of its phylum that does not have a
4. Bivalves move water through their bodies to do what? and
5. Nudibranchs, commonly known as sea slugs, belong to the phylum Mollusca and the class
6. The mollusks on the right belong to the phylum Mollusca and the class:
7. a. Describe the characteristics that nematodes and arthropods have in common. (Circle the correct term)
Nematodes and arthropods...
have: bilateral symmetry radial symmetry
are considered: protostomes deuterostomes
have an: endoskeleton exoskeleton
8. b. Describe characteristics that nematodes and arthropods do not have in common. (Circle the correct term)
Body cavity
Nematodes are: acoelomates pseudocoelomates coelomates
Arthropods are: acoelomates pseudocoelomates coelomates
Segmentation:
Nematodes have segmentation: yes no
Arthropods have segmentation: yes no
9. The phylogenetic position of nematodes has varied due to its physical features, although molecular evidence supports the current position. Nematodes were once thought to be sister taxa to flatworms and even earthworms, due to their vermiform shape and other characteristics. Compare and contrast nematodes to two other phyla we have investigated.
Flatworms Annelids
One characteristic this phylum has in common with nematodes (other than vermiform shape):
One characteristic that differentiates nematodes from this phylum:

Added by Kevin L.

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