Which one of the following categories of animals, is correctly described with no single exception in it?
- All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal)
- All bony fishes have four pairs of gills and an operculum on each side
- All sponges are marine and have collared cells
- All mammals are viviparous and possess diaphragm for breathing
The Correct Option is B
Solution and Explanation
birth to young ones) with an exception, Ornithorhynchus (platypus), which is oviparous (egg laying).
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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