ACCEPTABLE REASONS TO USE SICK LEAVE. You can use sick leave when: 1  You have a mental or physical illness, injury, or health condition; you need to get a medical diagnosis, care, or treatment of your mental or physical illness, injury, or condition; you need to get preventive medical care.
A structural adaptation is when an animal or a living thing is adapted to its environment by the way its body is built or shaped.Structural adaptations involve physical traits that can help an organism to survive in its environment.ehavioural adaptations are different from structural adaptations, and mean the way that an organism behaves which helps it to survive in its environment.
Structural mobility is a kind of vertical mobility. Structural mobility refers to mobility which is brought about by changes in stratification hierarchy itself. It is a vertical movement of a specific group, class or occupation relative to others in the stratification system. It is a type of forced mobility for it takes place because of the structural changes and not because of individual attempts. For example historical circumstances or labor market changes may lead to the rise of decline of an occupational group within the social hierarchy.