In recent years, the British government took the lead in testing some transgenic winter rape fields. The researchers found that this transgenic crop may change the balance of weed species in the field, leading to a sharp decline in the number of insects such as butterflies and bees in the field, and also threatening the survival of many animals.
1999 In May, the authoritative British science magazine Nature published John, an associate professor at Cornell University. A paper by Rosie shocked the world. According to this paper, researchers will genetically modify insect-resistant jade.
Pollen from rice -Bt corn is scattered on the leaves of chicory, and then butterfly larvae eat these leaves. Four days later, 44% of the larvae died, and the surviving larvae were small and listless. While the other group ate.
Larvae scattered on the pollen leaves of common corn have low mortality and are not stunted. Based on this, the paper draws the conclusion that BT transgenic corn pollen contains toxins. BT transgenic corn is cultivated because of its ability to resist pests and diseases.
Yes, its cultivation method is to implant a gene into corn seeds, which can effectively kill corn pests. Some scientists believe that the implantation of BT gene can make corn produce substances that kill pests, thus having insect resistance.
Force, but also toxic, endangering the safety of other creatures.
In terms of animals, genetically modified organisms have more survival advantages than similar organisms after artificial transformation. Such as salmon implanted with human growth hormone. It is more than three times larger than ordinary salmon. And the growth rate becomes faster. Ecological research experts are very worried that genetically modified organisms with survival advantages will eliminate the original species in nature in the evolutionary process of "natural selection, eliminating the weak and retaining the strong"
Genetic pollution may occur in the following situations: wild relatives growing nearby are pollinated by genetically modified crops; Non-transgenic crops near farmland are pollinated by transgenic crops; Genetically modified crops can survive and coexist under natural conditions.
Cultivate into wild and weedy transgenic plants; Soil microorganisms or animal intestinal microorganisms absorb transgenic crops to obtain foreign genes. The reason why genetic pollution is very special and dangerous is that it is one of the most important diseases in the world.
The only pollution that can spread, spread and cannot be eliminated is as threatening as nuclear proliferation.