Describe briefly three of the most important periods of time in the evolution of life on the plan, giving examples of organisms that existed during that time and the major events that led to their demise. Why is the date 65.5 MB so crucial to the development of Life and existence on Earth?

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

the titanic would be the correct answer

answer;

medical directors

explanation;

medical directors grants and supervises the privilege or permission to use an aed on an ambulance.

other roles of a medical director includes;

-provide medical leadership, including coordination with local ems and 911 centers.

-provide guidance in equipment selection and deployment

-develop guidelines for responder actions

-oversee medical care that is rendered through the program, including review of all responses to medical emergencies

-ensure appropriate initial training and skill maintenance

-assume overall responsibility for the conduct and operation of all patient care related activities