Home » Biology » The most important substance necessary for the maintenance of life are carbon , oxygenThe most important substance necessary for the maintenance of life are carbon , oxygen The most important substance necessary for the maintenance of life are carbon , oxygen A. hydrogen, soil and enzymes B. hydrogen, salt and water C. nitrogen, salt and soil D. nitrogen, salt and water Correct Answer: Option D Explanation Related Posts Accommodation of the human eye is best described as the A state in Nigeria that is most susceptible to desert encroachment is Biology Theory (a)(i) What is placentation? (ii) Name two organs associated with the human placenta. (b) State… The nitrogenous substance that is excreted by birds in order to conserve water is The progressive loss of energy at each level in a food chain leads to A collection of population of all living organisms that exist in a habitat is referred…
Biology Theory (a)(i) What is placentation? (ii) Name two organs associated with the human placenta. (b) State…