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An enterocoelomate invertebrate group is
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Important Questions on Structural Organization in Animals
MEDIUM
Match the following.
| Sub Division | Character | Example | |||
| Acoelomata | Coelom is formed by archenteron | Mollusca | |||
| Pseudocoelomata | Without a body cavity | Hemichordata | |||
| Schizocoelomata | Body cavity should not lined by mesodermal layers | Nematoda | |||
| Enterocoelomate | Coelom is formed by splitting of mesoderm | Platyhelminthes | |||
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The animals in which cleavages are radial and indeterminate and possess enterocoelom are generally:
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Principal type of symmetry in triploblastic animals
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Match the following and choose correct combination.
| Column I | Column II | ||
| i) | Cellular grade level | a) | Pheretima |
| ii) | Tissue grade level | b) | Schistosoma |
| iii) | Organ level | c) | Obelia |
| iv) | Organ system level | d) | Sycon |
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Identify the correct statement with reference to 'Enterocoelomates'.
A Body cavity is formed from endodermal pouches
B. They display determinate type of cleavage
C. Enterocoelomates are deuterostomes
D. Hemichordates are enterocoelomates
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Radial symmetry is often exhibited by animals having
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True symmetry found in an animal which can be divided into two similar halves by one plane only is ____.
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Match the species in Column-I with their respective feature of body organisation in Column-II
| Column-I | Column-II | ||
| P | Mollusca | i | Pseudocoelom |
| Q | Annelida | ii | Radula |
| R | Nematoda | iii | Radial symmetry |
| S | Echinodermata | iv | Segmentation |
Choose the CORRECT combination.
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Which one of the following phyla is a pseudocoelomate
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Which of the following phyla possess body cavity as shown in the diagram below?
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Bilaterally symmetrical and acoelomate animals are exemplified by
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Match the following
| List - I | List - II | ||
| (a) | Asymmetry | (i) | Cnidaria |
| (b) | Radial symmetry | (ii) | Platyhelminthes |
| (c) | Bilateral symmetry and Enterocoelom | (iii) | Porifera |
| (d) | Bilateral symmetry without body cavity | (iv) | Hemichordata |
The correct answer is
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Consider following features:
- Organ system level of organisation
- Bilateral symmetry
- True coelomates with segmentation of body.
Select the correct option of animal group which possess all the above characteristics:
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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
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The key evolutionary advance in Annelids is
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The animals in which coelom originates as a space in the mesoderm are termed as
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Coelom is found between
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True segmentation (metameric) occurred for the first time in
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Body is segmented in
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Cell aggregate plan is found in:
