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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
Identify me.
I am diploblastic & acoelomate. Which phylum do I belong to?
Give scientific reason .
Our body irritates if it comes in contact with jelly fish.
Label the following.
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?
What is the use of cnidoblast for us?
How do we destroy the harmful insects?
Draw a neat and labelled diagram.
Hydra
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?
What is polymorphism?
Alternation of generations in Coelenterata is known as
What is metagenesis? Mention an example which exhibits this phenomenon.
Give an example for the following:
Animal, which exhibits alternation of generation
