Question

Which of the following statements about diploblasts and triploblasts is false?a.Animals that display radial symmetry are diploblasts.b.The mesoderm gives rise to the central nervous system.c.Animals that display radial symmetry are diploblasts.d.The endoderm gives rise to the lining of the digestive tract and the respiratory tract.e.Animals that display bilateral symmetry are triploblasts.

Answer 1

The false statement is that the mesoderm gives rise to the central nervous system. In reality, the central nervous system is derived from the ectoderm. Triploblasts develop a third layer called mesoderm, contributing to greater structural complexity.

Step-by-step explanation:

The false statement among the options given about diploblasts and triploblasts is: 'The mesoderm gives rise to the central nervous system.' This statement is incorrect because the central nervous system primarily arises from the ectoderm, not the mesoderm. In contrast, the mesoderm gives rise to other systems such as muscles, the circulatory system, and the internal organs. Diploblasts, which display radial symmetry, have two embryonic germ layers: the ectoderm and endoderm. Meanwhile, triploblasts, with bilateral symmetry, have a third layer: the mesoderm. This layer allows for greater complexity and the formation of an internal body cavity, known as a coelom.

Answer 2

b) The mesoderm gives rise to the central nervous system.

Step-by-step explanation:

Mesoderm gives rise to bones, muscles, the heart and circulatory system, and internal sex organs.