Which are important parts of a cell membrane

Hey me with this one❤☺❤ how do you say that a cell also has a life span and death like an organism? give one example.

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

Tides that occur during the new and full moons