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Which statement about chordates and vertebrates is correct?
AAll chordates and all vertebrates are exactly the same group
BAll chordates are vertebrates, but not all vertebrates are chordates
CAll vertebrates are chordates, but not all chordates are vertebrates
DNo vertebrate is a chordate and no chordate is a vertebrate
Answer & Solution
Correct answer: C. All vertebrates are chordates, but not all chordates are vertebrates
1. Vertebrata is one of three subphyla within phylum Chordata.
2. So every vertebrate is a chordate, but Urochordata and Cephalochordata are chordates that are not vertebrates.
3. Rule out option B: it reverses the true containment.
4. Options C and D wrongly equate or fully separate the two groups.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 6 "Animal Classification", p.81_
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