Given below are two statements: One is labelled as Assertion 
and the other is labelled as Reason 
.
Assertion A: Members of subphylum vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult.
Reason R: Thus all chordates are vertebrates not all vertebrates are chordates.
In the light of the above statements choose the correct answer from the option given below.
is true but 
is false. 
is false but 
is true 
and 
are true and 
is the correct explanation of 
. 
and 
are true but 
is NOT the correct explanation of 
.
Text Solution
Verified by ExpertsNOT AVAILABLE
Phylum Chordata is divided into three subphyla: Urochrodata, Cephalochordata and Vertebrata. The members of subphylum Vertebrata possess notochord during the embryonic period. The notochord is replaced by a cartilaginous or bony vertebral column in the adult. Thus, all vertebrates are chordates but all chordates are not vertebrates.
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