A pathogenic strain of bacteria has become resistant to an antibiotic that once could kill it. What has happened to these bacteria to make this happen? (4 points) a
The bacterial cells learned to remove the receptors on their cell surfaces, making it impossible for the antibiotic to attack them.

b
Most of the bacteria make changes to their DNA to protect themselves, making themselves immune to future attacks.

c
Some of the bacterial cells were able to produce toxins against the antibiotics, making them more likely to survive.

d
Only the few bacteria that were immune to the antibiotic survived and reproduced, making all their offspring immune to it as well.

d. That’s how evolution works!

Explanation:

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive

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