Siphonozoids of Pennatrula differ from autozoids in

Options :
  1. having tentacles and gonads
  2. lacking tentacles and gonads
  3. both the above
  4. none of these
Answer and Explanation :-

Answer: Option 2


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Distinguishing the signal from the noise requires both scientific knowledge and self-knowledge: the serenity to accept the things we cannot predict, the courage to predict the things we can, and the wisdom to know the difference.
-Nate Silver The Signal and the Noise: Why So Many Predictions Fail - But Some Don't