The discovery of the mitochondrial dna (mtdna) has no effect on which area of scientific investigation

The answer is study of cork bark.

According to the process of elimination:

- The endosymbiotic theory explains that mitochondria and chloroplasts descended from the same type of bacteria - thus, mtDNA is important in investigation of endosymbiotic theory

- DNA present in mitochondria is important also for inheritance research and forensic science.

This leaves study of cork bark as the right choice, which is confirmed by knowing that mtDNA contains genes for some metabolic processes.

The answer is study of cork bark.

Explanation:

the answer is d (apex) good luck : ))

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.