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Question

The early human embryo distinctly possesses

A
Gills
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B
Gill slits
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C
External ear (pinna)
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D
Eyebrows
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Solution

The correct option is A Gill slits
Early embryo of different vertebrates resembles each other in possessing similar structures like notochord, pharyngeal gill slits etc. Gill slits are filter feeding organs which are prominently present in invertebrates.
Therefore, the correct answer is option B.

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