The correct answer is C. Forms blood and bone (leads to complex internal organs).
Mesoderm is the middle layer of the three primary germ layers in the developing embryo. It gives rise to many important structures in the body, including the bones, muscles, blood, and circulatory system.
A. Anatomically advanced animals having all three germ layers is not related to mesoderm. All animals have three germ layers, not just anatomically advanced animals.
B. No membrane-bound organelles, no peptidoglycan in cell walls, introns is not related to mesoderm. This is a description of prokaryotes, which are single-celled organisms that do not have a nucleus.
D. Binomial system of classification is not related to mesoderm. This is a system of naming organisms that was developed by Carl Linnaeus.