They form a complex called chromatin
Human anatomy deals with the study of the human body, its structures, and how these structures specifically function. Microscopic anatomy on the other hand deals with structures found within the body that cannot be seen by the naked eye but can be viewed with the use of the microscopic. Microscopic anatomy deals with the study of the smallest structures of the cells, tissues, and organs of the body.
Answer - They take in C02 (Carbon Dioxide) & Release O2 (Oxygen)
Reasoning - To be able to do Photosynthesis they Plants need C02 which is one of the important components to making Glucose. During that gas exchange they release O2 for C02.