Match List-I with List-II regarding the features of different animal phyla. List-I List-II A. Mesoderm as scattered pouches 1. Platyhelminthes B. Body cavity lined by mesoderm 2. Aschelminthes C. Absence of body cavity 3. Annelida D. Cellular level of organization 4. Porifera Choose the correct answer from the options given below:

Step-by-step solution

In Aschelminthes, the body cavity is not lined by mesoderm; instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called a pseudocoelom. Thus, A matches with 2. In Annelida, the body cavity is lined by mesoderm, which is called a true coelom. Thus, B matches with 3. In Platyhelminthes, the body cavity is absent, making them acoelomates. Thus, C matches with 1. In Porifera, the animals exhibit a cellular level of organization. Thus, D matches with 4. Theref