OnlineCBT
Biology · ANIMAL KINGDOM
हिन्दीIdentify the phylum in which BOTH Circulatory System AND Respiratory System are listed as "Present" for the first time as we move from Porifera to Chordata.
Correct answer · Option 2
Arthropoda
Explanation
In Table 4.2, Annelida possesses Circulatory System = Present but Respiratory System = Absent. Arthropoda is the first phylum where both Circulatory and Respiratory systems are 'Present'.
