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प्रश्न
How do we destroy the harmful insects?
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उत्तर
Tentacles are useful for capturing the prey, whereas cnidoblasts penetrate the skin as a defensive action and inject toxins into the body of the harmful insects thus destroying them.
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संबंधित प्रश्न
Give scientific reasons.
Our body irritates if it comes in contact with jelly fish.
Label the following.
Porifera : Asymmetrical : : Cnidaria : __________
Give scientific reason.
Our body irritates if it comes in contact with a jellyfish.
Mesoglea is present in ______.
State whether true or false. If false, correct the statement.
Canal system is seen in coelenterates.
What is nematocyst?
Define the terms and give one example
Coelom
______ are diploblastic.
How is the body wall of coelenterates arranged?
What is polymorphism?
Alternation of generations in Coelenterata is known as
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 ______.
Match the following:
| Animals | Locomotory Organ |
| a. Octopus | i. Limbs |
| b. Crocodile | ii. Comb plates |
| c. Catla | iii. Tentacles |
| d. Ctenoplana | iv. Fins |
