Directions ; In this section, there is a passage that has some blank spaces, each with four words or group of words. Select whichever word or group of words you consider the most appropriate for the blank space and indicate your response on the Answer Sheet accordingly. 

Most of our food comes from agriculture, so we tend to believe that it is  ______ (1) of natural biota. This is not true. In nature,  _______ (2) plants and animals ______ (3) to the rigours of natural selection. Only the fittest survive. _______ (4) wild populations have numerous traits for competitiveness, resistance to parasites, ________ (5) to adverse conditions,_______ (6) other aspects of vigour. In contrast, populations grown for many _______ (7) under the pampered conditions of agriculture tend to lose these traits, because they  _______ (8) for production, not resilience. For example, a  high-producing plant _______ (9) lacks resistance to drought is ________ (10) and the resistance to drought is ignored. Also, in the process of breeding plants for maximum production, all genetic variation is eliminated.