How were two traits altered that resulted in modern day corn plants?

Which type of technique (selective breeding or genetic engineering) is used to produce corn from teosinte?

In terms of offspring traits, why sexual reproduction and not asexual reproduction was used to produce corn plants from teosinte plants?

Insect pests damage a large amount of corn every year. One way scientists have successfully solved this problem is by growing a variety of corn that has an insect-resistant gene, the Bt gene, spliced into its genetic material. The Bt gene is cut from specific bacteria and inserted into the genetic material of corn. Insects feeding on this “Bt corn” get sick and die soon after. The chart below illustrates and describes a part of the process.

Adding the genetic material from the bacterium to the genetic material of the corn is an example of

Sometimes traits that are not expected show up in organisms such as corn. Some of these traits are desirable, while others are harmful. The model below shows a structural change occurring in a chromosome.

Which change would not result in a new trait being seen in future generations of corn?

The graph below shows how the changes in acres of Bt corn grown from 1996 to 2008 have influenced the amount of insecticide used per acre over that same period of time.

The graph indicates that the design solution of adding the Bt gene into corn plants helps protect the stability of an ecosystem by