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　　36. There are a couple of plants tough and adaptable enough to survive on bare rocky hills and in deserts.

　　答案：【C】段

　　C) Extreme conditions produce extremely tough plants. In the rusty red deserts of South Africa, …

　　37. Farrant is trying to isolate genes in resurrection plants and reproduce them in crops.

　　答案：【H】段

　　H) After completing her Ph.D. on seeds, Farrant began investigating whether it might be possible to isolate her properties that make most seeds so…

　　38. Farmers in South Africa are more at the mercy of nature, especially inconsistent rainfall.

　　答案：【B】段

　　B) Biologist Jill Farrant of the University of Cape Town in South Africa says that nature has plenty of answers for people who want to grow crops in

　　39. Resurrection crops are most likely to be the choice of subsistence farmers.

　　答案：【K】段

　　40. Even though many plants have developed carious tactics to cope with dry weather, they can’t survive a prolonged drought.

　　答案：【E】段

　　E) The big difference between “drought-tolerant”plants and these tough plants: metabolism. Many different kinds of plants have…

　　41. Despite consumer resistance, researchers are pushing ahead with genetic modification of crops.

　　答案：【I】段

　　I) Once Farrant and her colleagues feel they have a better sense of which switches to throw,…

　　42. Most seeds can pull through dry spells and begin growing when conditions are ripe, but once this process starts, it cannot be held back.

　　答案：【G】段

　　G) What else can do this dry-out-and-revive trick? Seeds-almost all of them. At the start of…

　　43. Farrant is working hard to cultivate food crops that can survive extreme dryness by studying the traits of rare wild plants.

　　答案：【B】段

　　B) Biologist Jill Farrant of the University of Cape Town in South Africa says that nature has plenty of answers for people who want to grow crops in

　　44. By adjusting their metabolism, resurrection plants can recover from an extended period of drought.

　　答案：【F】段

　　F) Resurrection plants, defined as those capable of recovering from holding less than 0.1 grams of water per gram of dry mass, are different. They lack…

　　45. Resurrection plants can come back to life in a short time after a rainfall.

　　答案：【D】段

　　D) Farrant calls them resurrection plants. During months without water under a harsh sun,…

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