This is known as aversion therapy. Here, a patient is concurrently exposed to a stimulus, typically an addiction, and some form of discomfort. The idea behind this is that the patient will associate the addiction with unpleasant experiences. In this way, it is hoped that the patient will overcome his/her addiction. This sort of therapy has taken many forms. The more common form is for example to paint unpleasant-tasting nail polish on one's nails to discourage nail chewing. More extreme forms include electric shock therapy.
Contain 46 chromosomes each
Answer:
Xylem cells have no cytoplasm or end walls, meaning they form a tube through which water can pass freely to allow water transport. Lignin strengthens the cell walls, helping to support the plant.
Answer:
1. the DNA of which has been modified using genetic engineering methods. In most cases, the aim is to introduce a new trait to the plant which does not occur naturally in the species.
2. GM crops are made through a process known as genetic engineering. Genes of commercial interest are transferred from one organism to another. Two primary methods currently exist for introducing transgenes into plant genomes. The first involves a device called a 'gene gun'.
3. Crops do not damage the environment simply because they are GM. Some farming practices, such as the overuse of herbicides resulting in the excessive eradication of wild plants from farmland have been shown to harm the environment. These problems are similar for non-GM and GM crops.
