Question 1 2 out of 2 points why are all the people on earth members of the same biological species? selected correct all people can mate with one another and have children. correct correct all people can mate with one another and have children. response feedback: consider how reproduction and fertile offspring are requirements of the definition of a biological species. question 2 2 out of 2 points what is speciation? selected correct the process by which new species are formed correct correct the process by which new species are formed response feedback: this has occurred when two populations of the same species can no longer interbreed. question 3 0 out of 2 points which stage is the first stage of speciation? selected incorrect the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring. correct correct the populations become totally separated from one another. response feedback: two populations of the same species will develop different traits when exposed to different environments and unable to be with each other. question 4 0 out of 2 points which stage is the last stage of speciation? selected incorrect the populations become totally separated from one another. correct correct the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring. response feedback: consider how the environments of two separated groups may differ. question 5 2 out of 2 points which stage is the middle stage of speciation? selected correct the populations are isolated and thus do not interbreed. correct correct the populations are isolated and thus do not interbreed. response feedback: consider that if two populations of a same species are separated, they cannot mate.