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.
What is a 'Structural Change' A structural change is an economic condition that occurs when an industry or market changes how it functions or operates. A structural change will shift the parameters of an entity, which can be represented by significant changes in time series data. An economic condition that occurs when an industry or market changes how it functions or operates. A structural change will shift the parameters of an entity, which can be represented by significant changes in time series data.