Consider the given two statements:
Statement 1: Hemichordates were earlier considered as a sub-phylum under Phylum Chordata but are now placed separately in a phylum under non-Chordata.
Statement 2:  Hemichordates have a rudimentary structure in the collar region called stomochord, a structure homologous to the notochord.
 
1.  Both Statement 1 and Statement 2 are correct but Statement 2 does not explain Statement 1.
2.  Statement 1 is correct and Statement 2 is incorrect.
3.  Both Statement 1 and Statement 2 are incorrect.
4.  Both Statement 1 and Statement 2 are correct and Statement 2 explains Statement 1.
Subtopic:  Phylum Hemichordata |
Level 4: Below 35%
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