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Question
Human beings belong to the category ________ because they have a jawline.
Options:
A .  Chordata
B .  Mammalia
C .  Gnathostomata
D .  Agnatha
Answer: Option C
:
C
Humans belong to Phylum Chordata because of the presence of an embryonic notochord. Since this notochord gets replaced with a vertebral column in the fully developed humans, they belong to subphylum Vertebrata. Further, since they have a jawline, they belong to Division Gnathostomata. Mammalia is a class under Gnathostomata.

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