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प्रश्न
Give scientific reason.
Our body irritates if it comes in contact with a jellyfish.
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उत्तर
- The mouth of jellyfish is surrounded by tentacles.
- The tentacles possess cnidoblasts which are used for capturing prey or for defense.
- When our body comes in contact with the tentacles of jellyfish, these cnidoblasts penetrate our skin as a defensive action.
- Cnidoblast injects the toxin in our body and thus, our body irritates if it comes in contact with jellyfish.
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संबंधित प्रश्न
Sketch, labell and classify Hydra .
Porifera : Asymmetrical : : Cnidaria : __________
The body of the animal in which phylum is radially symmetrical and diploblastic?
To which phylum I belong to, if I have cnidoblast-bearing tentacles?
To which phylum we belong to, if we are marine/aquatic animals?
Draw a neat and labelled diagram.
Hydra
State whether true or false. If false, correct the statement.
Canal system is seen in coelenterates.
Match the following.
| PHYLUM | EXAMPLES | ||
| (A) | Coelenterata | (i) | Snail |
| (B) | Platyhelminthes | (ii) | Starfish |
| (C) | Echinodermata | (iii) | Tapeworm |
| (D) | Mollusca | (iv) | Hydra |
What is nematocyst?
Real organs are absent in
Name the following:
A phylum with diploblastic animals.
What is polymorphism?
Which of the following traits is not shared by both sea anemones and jelly fish?
Provide appropriate technical term in the space provided.
Free-floating form of cnidaria ______.
Provide appropriate technical term in the space provided.
Stinging organ of jelly fishes ______.
Give an example for the following:
Animal, which exhibits alternation of generation
