Which macromolecule is a primary component of cell walls, and which argument provides evidence for how the structure of this molecule relates to its purpose within the cell wall? A Lipids are the primary component, and they repel and prevent excess uptake of water because they form carbon chains.

B Lipids are the primary component, and they protect the cell and help maintain its shape because they form carbon rings.

C Carbohydrates are the primary component, and they repel and prevent excess uptake of water because they form carbon chains.

D Carbohydrates are the primary component, and they protect the cell and help maintain its shape because they form carbon rings.

probably b

Explanation:

because they are close to the cell wall and they protect a cell

the dark variety, as they are not visible on the dark tree barks

explanation:

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