Lets see, well disease, poor living conditions, and genetic mutations.
Answer:
Vestigial structures
Explanation:
Vestigial structures serve little or no purpose for an organism. An example being the human tailbone which at one point might have been a tail, but serves no real purpose now since we're bipedal organisms
Answer:
The use of genetic engineering in developing disease-resistant plants. The techniques of genetic engineering can be used to manipulate the genetic material of a cell in order to produce a new characteristic in an organism.