1. Which is a reason farmers may choose to plant genetically modified crops?
- higher tolerance to insects
- fewer tractors needed
- saves time during harvests
2. What is the transfer of genes or pieces of DNA from one organism to another?
- DNA cloning
- genetic engineering
- cellular stemming
3. What could be a negative impact of planting crops that have been engineered to make their own pesticides?
- could harm beneficial insects
- could be harder to replant
- could grow without stopping

you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.