Which of the following is common among mammals?
Correct answer: A. They undergo no moulting
- A. They undergo no moulting
- B. They have seven cervical vertebrae
- C. They are carnivores
- D. They have ventral nerve cords
Explanation
Mammals do not undergo moulting. Moulting is usually exhibited by invertebrates. In many vertebrate species, cervical vertebrae are variable in number, however almost all mammals have seven cervical vertebrae including those with short necks such as elephants or whales and those with very long necks, such as giraffes. However, there are a few exceptional cases in which There are nine cervical vertebrae in mammals. All the mammals are not carnivorous, they may be herbivorous, carnivorous and omnivorous as well. Mammals have dorsal nerve cord.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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