填空题 Questions 36-40
Complete the summary below.
Choose NO MORE THAN THREE WORDS from the passage for each answer.
Write your answer in boxes 36-40 on your answer sheet.
A group of scientists have carried out experiments on cacao samples of over 1,200 so as to find the way to increasing cacao's yields. They differentiated almost all cacao samples with (36) and got to know their relations. It was found that one cacao gene which could resist attack from (37) was located at the same place with its enemy. Although the process of seeking genes is harsh, the group of researchers still chose to offer us collective knowledge rather than (38) in order to protect our future. Once finding suitable genes, farmers could plant fruits and trees on the land where (39) used to grow. This is beneficial for lowering (40) through plants mixture.