The animals having structures shown in the figures are respectively called:
A) Diploblastic, triploblastic
B) Triploblastic, diploblastic
C) Diploblastic, diploblastic
D) Triploblastic, triploblastic
Correct Answer: A
Solution :
[a] On the basis of the given figure of germinal layers, the animals belongs to 1 and 2 are respectively diploblastic and triploblastic. Diploblastic animals have two germinal layers, outer ectoderm and inner endoderm, e.g., porifera and coelenterate. Triploblastic animals have three germinal layers - outer ectoderm, middle mesoderm and inner endoderm, e.g., platyhelminthes, aschelminthes, annelida, arthropoda, molluscs, echinodermata and chordata.
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