Appearing first as a lowly weed, corn has, over the past several thousand years, become embedded in our food chain as a vegetable, a sweetener, and even a fuel. the long process of selecting, weeding, cultivating and fostering selected strains of the original weed is a form of

The correct answer is: Genetic modification

Explanation:

Genetic modification, also known as genetic engineering, refers to the use of biotechnology for the genetic manipulation of an organism.

This process involves altering the genetic makeup of an organism in order to produce improved and better organism. The organism produced with the use of this technique is known as the genetically modified organism.

Therefore, the given example of selecting the strains of original weed and then cultivating and fostering to produce genetically modified product is called Genetic modification.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: