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#Question id: 8908

According to one hypothesis, the jaws of vertebrates were derived by the modification of

#9. Diversity of Life Forms
  1. scales of the lower lip.
  2. skeletal rods that had supported pharyngeal (gill) slits.
  3. one or more gill slits.
  4. one or more of the bones of the cranium.
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#Question id: 16783

#13. Methods in Biology

The range of the data 14, 6, 12, 17, 21, 10, 4, 3 is
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#Question id: 16785

#13. Methods in Biology

Median of 25, 72, 28, 65, 29, 60, 30, 54, 32, 53, 33, 52, 35,51, 42, 48, 45, 47, 46, 33 is 
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#Question id: 16786

#13. Methods in Biology

What is the median of 7.1, 3.2, 5.8, 8.9, 6.5, 10.2, 9, 12.5 
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#Question id: 16787

#13. Methods in Biology

The following observations are arranged in ascending order. The median of the data is 15 find the value of x. 
8, 11, 12, x + 6, 17, 18, 23 
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#Question id: 16788

#13. Methods in Biology

If he arithmetic mean between a " 1 and b, then n is equal to 
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#Question id: 16789

#13. Methods in Biology

The median of number 50, 48, 47, 48.5, 50.5, 52, 48.8, 46 will be: