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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
Identify me.
I am diploblastic & acoelomate. Which phylum do I belong to?
Give scientific reasons.
Our body irritates if it comes in contact with jelly fish.
Label the following.
Tentacles are used for capturing the prey.
The body of the animal in which phylum is radially symmetrical and diploblastic?
How does the animal in the figure protect itself?
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?
Why coelenterates are called diploblastic animals?
Real organs are absent in
What is metagenesis? Mention an example which exhibits this phenomenon.
Match the following:
| Animals | Locomotory Organ |
| a. Octopus | i. Limbs |
| b. Crocodile | ii. Comb plates |
| c. Catla | iii. Tentacles |
| d. Ctenoplana | iv. Fins |
Differentiate between polyp and medusa
Name
An animal with cnidoblasts
Give an example for the following:
Animal, which exhibits alternation of generation
