117 Biology Most Important Questions and Answers
117 Biology Most Important Questions and Answers Biology Most Important Questions and Answers Part 1 (Questions 1-30) 1) Which is the first oxygen producing organism? Answer: Autotrophic cyanobacteria. 2) How much biosphere extends to the distance? Answer: 22.5 Km. 3) How the populations of different species are is kept under check? Answer: By food chain. […] More