DNA has a sequence of nucleotides with different bases to determine traits of an organism. Scientists can genetically modify these sequences in order to give an organism more desirable traits. Do you think gene modification is ethical? Why or why not?

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

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

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.