Cat, rat and bat belong to the class Mammalia. The common characteristic features between them are as under-
- All of them are multicellular and have nucleus present in their cells.
- Their mode of nutrition is heterotrophic in nature.
- All have notochord present in them.
- The presence of four-chambered heart in them.
- They have a dorsal nerve cord.
- All are triploblastic in nature.
- They are coelomate.
- They are viviparous i.e. give birth to the offsprings and have mammary glands present to feed their offsprings.
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