JAMB Biology 2014 Objective — Question 1

Question 1 of 49 from the Joint Admissions and Matriculation Board (JAMB) Biology 2014 Objective paper, with the correct answer and a full explanation.

Which of the following has the most primitive respiratory system?

A. Insect
B. Fish
C. SnailCorrect
D. Mouse

Explanation

Snails have a simple mantle cavity respiratory system, more primitive than gills, tracheae, or lungs.

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