First slide

Classification of Animals

Question

Which of the following possess an open circulatory system?
A. Nereis
B. Limulus
C. Balanoglossus
D. Branchiostoma

Moderate

A

B and C
B

C and D
C

A and C
D

A and C

Solution

Limulus (Arthropoda) and Balanoglossus (Hemichordata) have open type of circulatory system. Nereis (Annelida) and Branchiostoma (Cephalochordata) have closed type of circulatory system.

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