Advertisements
Advertisements
प्रश्न
How do we destroy the harmful insects?
Advertisements
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.
APPEARS IN
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.
Sketch, label and classify a butterfly.
How does the animal in the figure protect itself?
To which phylum we belong to, if we are marine/aquatic animals?
What is the use of cnidoblast for us?
Draw a neat and labelled diagram.
Hydra
Mesoglea is present in ______.
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?
______ are diploblastic.
What is polymorphism?
Alternation of generations in Coelenterata is known as
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 |
Give an example for the following:
Animal, which exhibits alternation of generation
