测试题
1. Compared with genetic engineering of food crops, genetic engineering of trees____________________.
A) began much later B) has developed more slowly
C) is less useful D) was less controversial
2. What does the author think about the genetic engineering of pine trees?
A) Time-consuming. B) Worthwhile.
C) Significant. D) Technically impossible.
3. What can we learn about the research on tree genes?
A) The research methods are the same as the analysis of human genes.
B) The findings are expected to be as fruitful as the analysis of human genes.
C) It will take as much time and effort as the analyst, of human genes.
D) The research has been mainly concentrated on the genes of young trees.
4. It is discovered by Henry Amerson s team that_______________.
A) southern pines cannot resist fungus
B) all southern pines are not susceptible
C) the genetic marker in southern pines was the easiest to identify
D) fungus-resistant genes came originally from outside the U.S.A.
5. What is the primary objective of carrying out the Pine Gene Discovery Project?
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