The order of steps for the digestion of proteins will be; 
In mechanical digestion, the teeth grind food and break it in to smaller parts. 
Churning and the enzyme pepsin break down protein in the stomach
The pancreas releases enzymes trypsin and chymotrypsin
Tryspsin and chymotrypsin act on the proteins to break them down in the duodenum 
Amino acids are absorbed by the capillaries in the Jejunum  and lastly
The amino acids enter the blood stream and are circulated throughout the body. 
        
             
        
        
        
I think the correct answer from the choices listed above is option B. The difference in biodiversity between the tundra and the tropical rain forest would be that warmer temperatures and higher average rainfall in the tropical rainforest allow more things to survive. Hope this answers the question.
        
                    
             
        
        
        
A) .was immediately accepted
Explanation:
The theory of plate tectonics was immediately recognized as the explanation for the moving continents. It provided a more scientific background as why continents drift apart and the seafloor keeps spreading. 
- The theory explains that the earth is broken up into series of slabs called lithosphere which moves on the weak, ductile and fluid asthenosphere. 
- The movement of part of the earth mantle provided the mechanism through which the lithosphere moves. This is now known as the mantle convection.
- This theory provided a scientific mechanism through which the plate moves and seafloor spreads. 
- It was immediately accepted when the theory was propounded by Alfred Holmes in the 1930s 
Learn more; 
Continental drift brainly.com/question/5002949
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