Answer:
Fossil fuels produce energy when used
Explanation:
when something combusts or is used it produces energt
 
        
                    
             
        
        
        
Answer:
A. ponds are shallower than lakes 
E. lakes are colder and darker at the bottom than ponds
 
        
             
        
        
        
Gymnosperms are no longer restricted to moist environments, as are ferns and mosses because they have evolved to produce non-flagellated pollens that do not require water or moisture to reach the egg whereas ferns and mosses have flagellated sperm that needs moisture to swim towards the egg.
Another major evolutionary adaption in gymnosperms is the production of seeds instead of spores since seeds contain their own nutrition in the form of endosperm, seeds can travel large distances through wind or animals and can germinate when they find suitable conditions. Seeds can remain dormant for several years whereas spores have a shorter lifespan.
To learn more about endosperm here 
brainly.com/question/87065
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Catalysis An enzyme may catalyse a reaction by stressing or
destabilizing the bonds of the substrates. This point in the enzymatic reaction
is known as the Transition State.  An
enzyme can couple a nonspontaneous reaction to a spontaneous reaction so that
anabolic processes will occur.