What gases are represented by label b and how do these gas levels relate to the evolution of photosynthetic organisms

Our planet's atmosphere has changed quite a bit over time.

Explanation:

The planet is generally thought of as having three distinct atmospheres over the course of its lifetime.

answer; (phospholipid);

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.