Leaves need to be elevated so they are exposed to sunlight for photosynthesis. which part of the stem grows to make this possible?

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

What is the problem in this article? what solution does the article propose?