Which of the following character is not found in all the chordates:
- Diaphragm
- Coelom
- Pharyngeal gill clefts
- Dorsal nerve cord
The Correct Option is A
Solution and Explanation
Diaphragms are not a universal feature of chordates. While all chordates have a dorsal solid nerve cord, a notochord (which may be replaced by a vertebral column in some), and pharyngeal gill clefts (which may be present during embryonic development), the presence of a diaphragm is specific to mammals and is not found in all chordates.
So, the correct option is (A): Diaphragm
Top Questions on Kingdom Animalia
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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:
- Porifera
- Coelenterata (Cnidaria)
- Platyhelminthes
- Nematoda
- Annelida
- Arthropoda
- Mollusca
- Echinodermata
- Hemichordata
- Chordata
Read More: Classification of Animal Kingdom