For each phylum, list the characteristics; 1.) Cnidaria Environment: Level of or
ID: 184553 • Letter: F
Question
For each phylum, list the characteristics;
1.) Cnidaria
Environment:
Level of organization (e.g. porifera = cellular):
Body symmetry:
Germ layers:
support system:
Nervous system:
Digestive system:
Circulatory system:
Respiratory system:
Excretory System:
Other Distinguishing Features:
2.) Ctenophora
For each phylum, list the characteristics:
Environment:
Level of organization (e.g. porifera = cellular):
Body symmetry:
Germ layers:
support system:
Nervous system:
Digestive system:
Circulatory system:
Respiratory system:
Excretory System:
Other Distinguishing Features:
Explanation / Answer
1.) Cnidaria
Environment - aquatic, mostly marine.
Level of organization - tissue level of organization.
Body symmetry - radially symmetrical
Germ layer - diploblastic.
Support system - skeleton composed of calcium carbonate.
Nervous system - diffused type formed of nerve-nets.
Digestive system- extracellular as well as intracellular.
Circulatory system - absent
Respiratory system - absent
Excretory system- absent
Other features-1. Cnidarian are multicellular organisms.
2. Stinging cells are present.
3. Coelom is absent.
4. Mouth is present but anal opening is absent.
2.) Ctenophora
Environment- marine.
Level of organization- tissue level
Body symmetry- radially
Germ layer- diploblastic
Support system- skeletal system absent but a special adhesive cells called colloblast are present.
Nervous system- in the form of nerve net.
Digestive system- both extracellular and intracellular.
Circulatory system- absent
Respiratory system - by diffusion
Excretory system- by diffusion
Other features- 1. cilia used for locomotion.
2. Two anal opening are present.
3. They are hermaphrodites.
4. They are acoelomate animal.
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