Help please I do not understand

What effect does plate tectonics have an organic evolution

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

What is the compliment dna strand to the following sequence: ttgactaggcta