Animal tissues deelop from embryonic germ layers. Triploblastic animals have thr

Question

Animal tissues deelop from embryonic germ layers. Triploblastic animals have three germ layers ( ectodem, mesoderm, and endoderm) and three basic body plans relatd to body cavities ( acoelomate, pseudocoelomate, and coelomate). Select the three statments that are true. 1. The digestive tract of a coelomate functions as a coelom. 2. In Pseudocoelomate, the tissue lining the inner side of the body cavity arises from the same germ layer as the muscles. 3. In the coelomate, the tissue lining the inner side of the body cavity arises from the same germ layer as the tissue lining the outer side of the body cavity. 4. A diploblast has no mesoderm. 5. In a coelomate, the tissue lining the inner side of the body cavity arises from the same germ layer as the lining of the digestive tract. 6.An acoelomate triploblast has no endoderm. 7. A pseudocoelom has the same functions as a tru coelom.

Explanation / Answer

The true statements are:

1) A diploblast has no mesoderm- Diploblastic animals have only two primary germ layers: the ectoderm and endoderm.

3) A pseudocoelom has the same functions as a true coelom- both coelom and pseudocoelom have the same function; but they differ only in they way they formed.

7) In a coelomate, the tissue lining the inner side of the body cavity arises from the same germ layer as the tissue lining the outer side of the body cavity

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