更多"Genetically Modified Foods -- Feed "的相关试题:
[单项选择] Genetically Modified Foods -- Feed the World
If you want to spark a heated debate at a dinner party, bring up the topic about genetically modified foods. For many people, the concept of genetically altered, high-tech crop production raises all kinds of environmental, health, safety and ethical questions. Particularly in countries with long agrarian traditions -- and vocal green lobbies -- the idea seems against nature.
In fact, genetically modified foods are already yew much a part of our lives. A third of the corn and more than half the soybeans and cotton grown in the US last year were the product of biotechnology, according to the Department of Agriculture. More than 65 million acres of genetically modified crops will be planted in the US this year. The genetic is out of the bottle.
Yet there are clearly some very real issues that, need to be resolved, lake any new product entering the food chain, genetically modified foods
A. genetically modified crop is beneficial
B. genetically modified crop causes environmental problems
C. high-tech crop is a great benefit to the world
D. genetically modified foods is a heated topic
[填空题]Many experts who favor genetically modified foods believe that genetic engineering can help to meet the demands of the world’s increasing population.
[单项选择] The Debate over Genetically Modified Foods
--Rice with built-in Vitamin A that can help prevent blindness in 100 million children suffering from Vitamin A deficiency
--A tomato (hat softens more slowly, allowing it to develop longer on the vine and keep longer on the shelf
--Potatoes that absorb less fat when fried, changing the ever-popular French fries from junk food into a more nutritional food
--Strawberry crops that can survive frost
These are some of the benefits promised by biotechnology. The debate over its benefits and safety, however, continues. Do we really need to fear mutant (突变体) weeds, killer tomatoes, and giant corn and will the benefits be delivered
Conventional Breeding Versus Genetically Modified (GM) Crops
For thousands of years farmers have used a process of selection and cross breeding to continually improve the quality of crops. Even in nature, plants and animals selectively breed, thus ensuring the optimum
A. Y
B. N
C. NG