A digestive system with a single opening is called:
AComplete
BSegmented
CDuplicated
DIncomplete
Answer & Solution
Correct answer: D. Incomplete
1. One opening has to serve as both mouth and anus.
2. Food and waste share the same route.
3. Such a digestive system is called incomplete.
_Source: NCERT Class 11 Biology, Chapter 4, Animal Kingdom._
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