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प्रश्न
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
उत्तर
- Arthropods make up the majority of the animal kingdom and are the most successful category of creatures. They comprise more than three-quarters of all currently known living and extinct species and have conquered the land, sea, and air.
- Their range extends from high summits to the deep sea. The exoskeleton, which shields the creature from predators, helps it tolerate temperatures of up to 100°C or more, and stops water loss, is made up of thick, durable, non-living chitinous cuticle.
- They can reproduce quickly, and it takes them less time for their eggs to hatch into offspring.
- There is less rivalry for food between the larval and adult forms as a result of metamorphosis. Cockroaches can withstand radioactive decay and toxic soil conditions.
- The largest phylum of animals is the arthropods because of all these criteria.
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संबंधित प्रश्न
How useful is the study of the nature of body cavity and coelom in the classification of animals?
What is the exact difference between grades of organization and symmetry? Explain with examples.
The following characteristics are essential for classification.
The symmetry exhibited in cnidarians is ______.
Which of the following animals has a true coelom?
Which of the following have the highest number of species in nature?
Which of the following is a crustacean?
Lateral line sense organs occur in ______.
Match the following columns and select the correct option.
| Column – I | Column – II | ||
| (p) | Pila | (i) | Devil fish |
| (q) | Dentalium | (ii) | Chiton |
| (r) | Chaetopleura | (iii) | Apple snail |
| (s) | Octopus | (iv) | Tusk shell |
Choose the term that does not belong in the following group and explain why it does not belong?
Notochord, cephalisation, dorsal nerve cord and radial symmetry.
What are flame cells?
______ was a greek philosopher who classified animals.
Examine the figures of diploblastic (i) and triploblastic (ii) organization in animals given below and identify the labelled parts A to D.
In some animal groups, the body is found divided into compartments with serial repitition of at least some organs. This characteristic feature is called ______.
Match the following list of animals with their level of organisation.
| Division of Labour | Animal |
| Column I | Column II |
| A. Organ level | i. Pheretima |
| B. Cellular aggregate level | ii. Fasciola |
| C. Tissue level | ii. Spongilla |
| D. Organ system level | iv. Obelia |
Choose the correct match showing division of labour with animal example.
Body cavity is the cavity present between body wall and gut wall. In some animals the body cavity is not lined by mesoderm. Such animals are called ______.
Which group of chordates possess sucking and circular mouth without jaws?
Provide appropriate technical term in the space provided.
Blood-filled cavity in arthropods ______.
