Animal cells migrate during morphogenesis. not plant cells
        
             
        
        
        
Less people would buy and the economy's health would go down.
        
             
        
        
        
The provide direct energy because they help it grow plants and when plants grow it helps us live. 
But it also provides indirect energy because the sun can cause droughts which is bad because with droughts we dont have enough water to water the plants and with that they dry out and die. 
        
             
        
        
        
Answer:
heart blood vessels and blood 
 
        
                    
             
        
        
        
<u>Answer:</u>
Approximately, the oldest stromatolites are 3.6 billion years old on earth.
<u>Explanation:</u>
- Stromatolites is not only oldest earths fossil but conspiracy in that they are singular visual portal in deep time on earth. 
- It is defined as laminated accumulation structure that is they stick up above sea floor . 
- Stromatolite buildings includes oldest fossils which are 3.5 billions old when the earth were too unfriendly to support life.
- The study of  fossil age, evolutionary, method of formation are known as paleontology. 
- These specimens are considered as old fossils which are around 3.4 to 4.1 billions years old.