Answer:
The development of all karst landforms requires the presence of rock which is capable of being dissolved by surface water or ground water. 
Explanation:
- Eijiro <3
 
        
                    
             
        
        
        
Wow! this si a huge question but analyzing all the datils from ths option you give me I have to say that C option: <span>Heat energy became trapped in the atmosphere by greenhouse gases and was used as an energy source in the building of macromolecules, is the one that gets closer to what the scientists have said recently. Take into account for example, the examinations of Dr. Stanley Millers. I think this can help you</span>
        
             
        
        
        
Alleles are two different forms of a single gene.
        
                    
             
        
        
        
No. The recorded drop in water in the pipet of the potometer would have been used not only for plant transpiration, but also to return the plant cells to a turgid state. Turgid means to expand<span> due to high fluid content. Plants are required to maintain turgid cells to maintain an upright position as loss of turgidity results in plant wilting.</span>