Organelles exist within cells, which exist within tissues. Communities exist within ecosystems, which exist in the biosphere.
        
             
        
        
        
Composite Volcano: S<span>teep sided cones formed from layers of ash and lava flows.</span>
Dome Volcano: Roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano
Shield Volcano:  A broad domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava.<span />
        
                    
             
        
        
        
Answer:
24 million years
Explanation:
A: GCACTAAGCATCGATTT 
B: GCACCAGGCACTGGTTC 
There are 6 base pair changes between species A and species B. Since we know the rate of change is 1 base pair every 4 million years, we know 6x 4 million is likely how long ago the species diverged. 6x 4 million = 24 million years
 
        
             
        
        
        
<h3>
Answer:</h3>
Enzymes functions in a specific temperature range.
<h3>
Explanation:</h3>
- Enzymes are biochemical catalysts whose function is to speed up the rate at which chemical reactions occur.
- Enzymes work best at a specific range of temperatures known as optimum temperature. 
- Low temperatures below optimum levels deactivate the enzyme and thus lowering the rate of enzyme activity.
- Extreme temperatures, on the other hand, denatures the enzyme altering enzyme's active sites making it difficult for substrates to fit.