Subject: Which evolved first (how, and how long, did it work without the others)?

Which evolved first (how, and how long, did it work without the others)? 
a. The digestive system, the food to be digested, the appetite, the 
ability to find and eat the food, the digestive juices, or the body’s 
resistance to its own digestive juice (stomach, intestines, etc.)? 
b. The drive to reproduce or the ability to reproduce? 
c. The lungs, the mucus lining to protect them, the throat, or the perfect 
mixture of gases to be breathed into the lungs? 
d. DNA or RNA to carry the DNA message to cell parts? 
e. The termite or the flagella in its intestines that actually digest the 
cellulose? 
f. The plants or the insects that live on and pollinate the plants? 
g. The bones, ligaments, tendons, blood supply, or muscles to move the 
bones? 
h. The nervous system, repair system, or hormone system? 
i. The immune system or the need for it? 

Re: Which evolved first (how, and how long, did it work without the others)?