Answer:
Genetic Mutation 
Explanation:
Speciation can be driven by evolution, which is a process that results in the accumulation of many small genetic changes called mutations in a population over a long period of time.
There are a number of different mechanisms that may drive speciation. 
Two of them to point out here.
1. natural selection 
2. genetic drift 
 genetic drift describes random fluctuations in allele frequencies in populations, which can eventually cause a population of organisms to be genetically distinct from its original population and result in the formation of a new species.
 
        
             
        
        
        
Answer:
It is thin tissue that lines the alveoli
Hope this helps.
 
        
             
        
        
        
I'm not sure but if you are talking about cells I think it is cytoplasm.
        
             
        
        
        
In every energy  transformation, some THERMAL ENERGY is released. 
When you climb a rope, you change CHEMICAL ENERGY INTO KINETIC ENERGY.
 In the muscles cells in your body, CHEMICAL ENERGY is changed into KINETIC ENERGY.
Energy can neither be created nor destroyed, because of this, energy usually remain constant but it can be converted from one form to another.
i just had to do this  lol
        
             
        
        
        
Answer:
Astronomy
Explanation:
Astronomy- is the the branch of science which deals with celestial objects, space, and the physical universe as a whole.