The fruit fly is an excellent organism for genetic studies because it has simple food requirements, occupies little space, is hardy, completes its life cycle in about 12 days at room temperature, produces large numbers of offspring, can be immobilized easily for examination, and has many types of hereditary variations. a. True
b. False

TRUE

Explanation:

The characteristics of D. melanogaster make it a good and easy species to work with. The fruit fly is excellent for genetic studies not only because of all the mentioned traits, but also because it results easy to immobilize them for examination, their four pairs of chromosomes can be easily identified in salivary glands, and many of their genetic variations can be seen using low power microscopes. Also, it results in a perfect organism that can be used in education during genetic curses either in high school or university.      

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

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