amylase breaks down starch sweet potatoes have a lot of starch
 
        
             
        
        
        
Answer - They can threaten the biodiversity of native.
Reason - Reason being they can threaten to the native is due to the invasive, reproduction, no predator to kill. Which leads to economic problems and environmental issues. :)
        
             
        
        
        
<h2>Answer</h2>
- Wind
- Sunlight
- Plants
- Soil
- Coal
- Minerals
- Water
- Animals

In short it's natural resources.
 
        
        
        
During exercise stroke volume increases because more blood is sent back to the heart due to the muscles squeezing blood in the veins