Question:

Which of the following is not an advancement of crocodilians over other reptiles?

Updated On: Jun 7, 2022
  • Thecodont teeth set in sockets
  • Lungs in pleural cavity
  • Muscular diaphragm
  • 3-chambered heart
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The Correct Option is D

Solution and Explanation

The crocodilians (corocodiles, alligators, gavials and caimans) include some of the largest living reptiles.Crocodilians differ from all other reptiles in having certain advanced characteristics such as the thecodont teeth set in sockets, relatively complete bony plate, lungs in pleural cavities separated from rest of the body cavity by a muscular diaphragm analogous to that of mammals, completely 4 chambered heart and a simple but grooved copulatory organ in male.
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Concepts Used:

Animal Kingdom

Animals are eukaryotic, multicellular species that belong to the Kingdom Animalia. Every animal has a distinct characteristic. They get energy either by feeding on plants or on other animals. There are millions of species that have been recognized, few shares similar characteristics while others vary drastically.

Kingdom Animalia comprises all animals. In the midst of the five kingdoms, the largest kingdom is the animal kingdom. Animals are multicellular eukaryotes. Though, like plants, they do not possess chlorophyll or a cell wall. Therefore, members of the animal kingdom indicate a heterotrophic mode of nutrition. Kingdom Animalia is further classified into ten different subphyla based on their body designs or differentiations.

The different phyla of the Kingdom Animalia are as follows:

  1. Porifera
  2. Coelenterata (Cnidaria)
  3. Platyhelminthes
  4. Nematoda
  5. Annelida
  6. Arthropoda
  7. Mollusca
  8. Echinodermata
  9. Hemichordata
  10. Chordata

Read More: Classification of Animal Kingdom