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प्रश्न
Mention special features of eye in Cockroach.
उत्तर
Special features of eyes in cockroaches are:-
- Their eyes are located on the dorsal side of the head.
- They are provided with compound eyes. An eye is composed of thousands of individual photoreceptors units called ommatidia.
- Together thousands of images are formed of a single object.
- Sensitivity is more but the resolution is very low.
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संबंधित प्रश्न
Draw a labelled diagram of alimentary canal of a cockroach
The male reproductive organs of cockroach include
Dorsally placed sclerites in cockroach are termed as :
Match the following with reference to cockroach and choose the correct option
| Column I | Column II |
| A. Phallomere | i. Chain of developing ova |
| B. Gonopore | ii. Bundles of sperm |
| C. Spermatophore | iii. Opening of the ejaculatory duct |
| D. Ovarioles | iv. The external genitalia |
How many times do nymphs moult to reach the adult form of cockroach?
Give the location of hepatic caeca in a cockroach. What is their function?
Structural organisation in animals attains different levels as cell - organ - organ system. What is missing in this chain? Mention the significance of such an organisation.
Complete the following statement:
In cockroach grinding of food particle is performed by ______.
Complete the following statement:
Malpighian tubules help in removal of ______.
Complete the following statement:
In cockroach blood vessels open into spaces called ______.
