According to the frontier ethic, saving endangered animal species may be considered foolish because a. animals cannot be controlled b. animals serve no human purpose c. extinctions occur as a natural process d. new species will take their place

Correct D) New species will take their place

Frontier ethics assumes that earth has unlimited supply of resources, if one resources is   eliminated other will take their place. It says that if resources run out in one area it can be found elsewhere human will find its substitute.

Endangered species are those species which are at the verge of extinction because of human activity, climate change or change in predator- prey ratio.

Example:  Leopard, Gorillas, Tiger

dna is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.