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प्रश्न
Differentiate between a diploblastic and a triploblastic animal.
उत्तर
| Diploblastic | Triploblastic |
| Diploblastic vertebrates have two embryonic layers i.e. ectoderm and endoderm. | Triploblastic vertebrates have three embryonic layers i.e. Ectoderm, endoderm and mesoderm. |
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संबंधित प्रश्न
Complete the following chart.
| Body cavity | Germ Layer | Phylum |
| Absent | ______ | Porifera |
| Absent | Triploblastic | ______ |
| Pseudocoelom | ______ | Aschelminthes |
| Present | ______ | Arthropoda |
Draw a neat and labelled diagram.
Jellyfish
The following characteristics are essential for classification.
Species is the ______ unit of classification.
Compare Schizocoelom with enterocoelom.
Identify the structure that the archenteron becomes in a developing animal.
______ was a greek philosopher who classified animals.
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 ______.
Identify the phylum in which adults exhibit radial symmetry and larva exhibit bilateral symmetry.
