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प्रश्न
Identify the structure that the archenteron becomes in a developing animal.
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उत्तर
The archenteron becomes the cavity of the digestive tract.
संबंधित प्रश्न
How useful is the study of the nature of body cavity and coelom in the classification of animals?
Distinguish between intracellular and extracellular digestion.
What are the reasons that you can think of for the arthropods to constitute the largest group of the animal kingdom?
Write in brief about progressive changes in animal classification.
What is the exact difference between grades of organization and symmetry? Explain with examples.
Write the correct co-relation:
Annelida: Earthworm :: Platyhelminthes: _______
Draw a neat and labelled diagram.
Jellyfish
The following characteristics are essential for classification.
The largest division of the living world is ______.
Which of the following animals has a true coelom?
In Pheretima locomotion occurs with the help of ______.
Lateral line sense organs occur in ______.
Which organism is called Friends of farmers? Why?
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.
Differentiate between a diploblastic and a triploblastic animal.
Provide appropriate technical term in the space provided.
Blood-filled cavity in arthropods ______.
Sort out the animals on the basis of their symmetry (radial or bilateral) coelenterates, ctenophores, annelids, arthropods, and echinoderms.
