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प्रश्न
Real organs are absent in
विकल्प
Mollusca
Coelenterata
Arthropoda
Echinodermata
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उत्तर
Coelenterata
Explanation -
Phylum Coelenterata (Cnidaria) has tissue level of body organisation i.e. the cells are grouped together to form tissues, which then perform specific functions. Tissues are not further organised in organs. Therefore, real organs are absent in Coelenterata. On the other hand, in the phyla Arthropoda, Mollusca and Echinodermata, there is organ system level of body organisation i.e. tissues are organised to form organs, which together form an organ system.
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संबंधित प्रश्न
How does the animal in the figure protect itself?
To which phylum we belong to, if we are marine/aquatic animals?
What is the use of cnidoblast for us?
Draw a neat and labelled diagram.
Hydra
Mesoglea is present in ______.
Match the following.
| PHYLUM | EXAMPLES | ||
| (A) | Coelenterata | (i) | Snail |
| (B) | Platyhelminthes | (ii) | Starfish |
| (C) | Echinodermata | (iii) | Tapeworm |
| (D) | Mollusca | (iv) | Hydra |
What is nematocyst?
Name the following:
A phylum with diploblastic animals.
How is the body wall of coelenterates arranged?
Give an example for the following:
Animal, which exhibits alternation of generation
