Was that poll done in Iran?
Why choose Iran? Just a generic, backward, Muslim country? Bad choice. Iranian education of evolution is equal to European countries:
In Iran, evolution is an important part of the K-12 biology curriculum. The standard Iranian text book in biology at the high-school level has been analyzed by Elise Burton who writes: “The evolution chapter, divided into three sections, provides a comprehensive introduction to the development of evolutionary theory, with the first section devoted primarily to Darwin and his influences and culminating in the formulation of the new synthesis; the second section to evidence of evolution, including paleontology, molecular and structural homology, and embryology, with discussion of evolutionary rates and punctuated equilibrium; and the third section to examples of natural selection, such as peppered moths and the work of Peter and Rosemary Grant on Darwin’s finches (3)”. The high-school curriculum in evolution in Iran appears to be at par with the education in most countries in Europe, the Americas, and East Asia.
http://www.nielsenlab.org/2016/02/teaching-evolution-in-the-middle-east/