Answer:
A. Classification of organisms
I think that the correct answer to this question is D .
Answer:
Photosynthesis
Explanation:
This is a role in the cycling of matter and flow of energy into and out of organisms. The flow of energy and cycling of matter can be traced.
Plants absorb carbon dioxide from the air, combine it with water and light, and make carbohydrates, the process known as photosynthesis.
Answer:
PCR is used in many research labs, and it also has practical applications in forensics, genetic testing, and diagnostics. For instance, PCR is used to amplify genes associated with genetic disorders from the DNA of patients (or from fetal DNA, in the case of prenatal testing).
