The following statements regarding mammals are correct except (1)Cloaca is present (2)External ear pinna present (3)Non-nucleated RBC (4)Excrete urea
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ans Cloaca is present
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Answer: 1) Cloaca is present.
Explanation:
- External ear pinna is a characteristic of mammals.
- Anucleated RBC is present in mammals only. Though some mammals have nucleated RBC also.
- Mammals excrete urea and are ureotellic.
- Cloaca is a common opening for intestinal, urinary, and genital tracts open. It is absent in mammals but it is present in vertebrates.
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