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 = the way it changes its body to fit the habitat.   Ex. An insect that has spikes on its body is a structural  adaptation, because its body layout changed.   An insect that plays dead is a behavioral adaptation because  it acts like it is dead, it did NOT change its body  layout.