Answer:
Fast-Twitch Fibers: baseball pitching
Slow-Twitch Fibers: long distance swimming, long distance running
The backbone of the DNA is made up of phosphate and deoxyribose. Deoxyribose is the sugar molecules found in DNA
When echinoderms move in a manner such as walking or crawling, they pump sea water through a series of internal body canals. The water is used to inflate some of the tube feet, causing them to expand. In many species, the tube feet are equipped with suc(k)ers that grip onto the sea floor.
Because every cell have some life span after this they become older and damage, so cells divide to replace old and damage cells.
