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Which of the following is a correct sequence of decreasing order of number of species ?A. Aves, pisces, reptiles, amphibians, mammalsB. Pisces, aves, reptiles, mammals, amphibiansC. Pisces, mammals, reptiles, amphibians, avesD. Amphibians, aves, pisces, mammals, reptiles |
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Answer» Correct Answer - B Balanoglossus belong to class enteropenusta. In certain cases, the probosics pore does not communicates with the probosics coelom, but terminate blindly, and may send off a narrow tubular diverticulum which opens inot the neurocoel. The proboscis sits in the collar somewhat like an acorn in its cup, a character that has given the name'acorm worm' to the group. |
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