There has been a shift in agricultural practices from conventionally grown produce towards organic methods of food production. Please choose if the statements below are true or false.Organic farmers can use pesticides.
查看答案
Apples that have been genetically modified to not turn brown as quickly when cut and potatoes genetically modified to eliminate black spots are both examples of:
A. Foods that achieve the desired characteristics through cross-pollination of two species as opposed to gene splicing.
B. Foods that have been modified using genes from the same type of plant as opposed to genes from other organisms.
C. Foods that have been reported to use genes from fish to achieve the desired characteristics in the end product.
D. Foods that have been modified to make them resistant to viruses that can threaten the crops.
What is the advantage of genetically modified low linolenic soybeans/soybean oil compared to regular soybeans?
A. It does not oxidize at high temperatures thus it can be used in frying.
B. It is genetically modified to contain more of the ‘healthy fats’ such as omega-3.
C. It grows in areas where there are water shortages because it can adapt to soil conditions and grow in dry soil using the small amount of moisture in the ground.
D. It helps prevent cancer because it has anti-carcinogenic properties.
i>Bacillus thuringensis (Bt) corn:
A. The entire genome of Bacillus thuringensis bacterium is added to the corn genome to protect the corn from insects such as the corn borer.
B. The corn genome has been modified to include genes from Bacillus thuringensis bacterium. When the field is sprayed with insecticides the plant is not affected while the insects are killed.
C. The corn is protected against insects (in particular the corn borer) through the insertion of genes that code for the Bacillus thuringensis toxin into the seed. The farmer does not have to spray pesticides because when the part of the plant with the Bacillus thuringensis genes is ingested, the insect dies.
Genetically modified foods, for example tomatoes, have been developed to target the end consumer. In addition, biotechnology companies make products for the agricultural industry. These GMOs are aimed at increasing farm yields. Dr. Schwarcz discussed the two most common – herbicide tolerate and pest-resistant crops. For each product below, select the description that accurately describes how the genetic modification works in the agricultural setting:Glyphosate resistant canola:
A. The canola genome has been modified to resist the glyphosate toxin produced by insects. Spraying with pesticides is no longer necessary because the insects die if they ingest part of the plant.
B. The canola genome has been modified to provide tolerance to glyphosate based herbicides. The modified plants are able to withstand application of the herbicide while weeds competing for nutrients in the soil are destroyed.
C. The canola genome has been modified to resist the glyphosate toxin produced by weeds. Spraying with pesticides can be reduced because the weeds will cause less damage to the plants.
微信支付 
支付宝支付