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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 and acoelomate. Which phylum do I belong to?
Give scientific reasons.
Our body irritates if it comes in contact with jelly fish.
Label the following.
Porifera : Asymmetrical : : Cnidaria : __________
What is the use of cnidoblast for us?
How do we destroy the harmful insects?
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
Define the terms and give one example
Coelom
Name the following:
A phylum with diploblastic animals.
How is the body wall of coelenterates arranged?
Alternation of generations in Coelenterata is known as
Which of the following traits is not shared by both sea anemones and jelly fish?
What is metagenesis? Mention an example which exhibits this phenomenon.
Provide appropriate technical term in the space provided.
Free-floating form of cnidaria ______.
Match the following:
| Animals | Locomotory Organ |
| a. Octopus | i. Limbs |
| b. Crocodile | ii. Comb plates |
| c. Catla | iii. Tentacles |
| d. Ctenoplana | iv. Fins |
