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Origin of sexual reproduction-Brad Harrub and Bert Thompson

Illustrate the quote Origin of sexual reproduction propose by Brad Harrub and Bert Thompson?

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The origin of sexual reproduction is an evolutionary enigma, complicated by the fact that the maintenance of such a reproductive process is extremely costly, energetically speaking. In addition, sexual reproduction results in only half of a parent’s genes being passed on to each of its progeny. Given the factthat this results in a 50% loss of genetic material from both the father and mother, a further enigma  has to do with whythere would be any advantage for animals to reproduce sexually. Evolutionists have yet to satisfactorily explain such an advantage. Purely philosophical theories regarding the evolution of sex are relatively simple. However, demonstrating how the necessary changes could have evolved on a macroscopic and microscopic level has yet to be accomplished. Evolution cannot explain the origination of egg cells and sperm cells, andhow the two come together to form a living being. It also cannot explain the difference between animal sexuality and human sexual relations. In light of the intricate complexity involved in the human  reproductive system, evolutionary theory does not provide sufficient answers. The only answer that provides both the how’s and why’s of sexual reproduction is an Intelligent Creator. 

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