Self-certification. Employers can also ask employees to fill in a form when they return to work to confirm theyâve been off sick for up to 7 days. This is called âself-certificationâ. Employers usually provide their own version of this form.elf-certification. Employers can also ask employees to fill in a form when they return to work to confirm theyâve been off sick for up to 7 days. This is called âself-certificationâ. Employers usually provide their own version of this form.
Â· just now. 1  The most massive stars (OB stars) have the shortest life. K and M stars are the least massive and have the longest lives. 2  McGarnigle is the most correct here. Type O and B are the hottest, most massive stars and, by virtue of their extreme mass, are the shortest lived.
Mayflies: Life Expectancy: 1 - 24 hours. Mayflies rank the top list of animal having shortest life span. They are prolific so their survival on earth depends on quantity rather than life quality. Gastrotrichs: Life Expectancy: 3 days. The gastrotrich lies the second on the list of animals having the shortest life cycle. This is the micro creature with dimensions of 0.06- 3 mm living in fresh water. Drone Ants: Life Expectancy: 3 weeks. Drone ants are also called male ants.