Farmers Benefit<span> from Agricultural </span>Biotechnology<span> Seeds. Decades of documented evidence demonstrates that agricultural </span>biotechnology<span> is a safe and beneficial technology that contributes to both environmental and economic sustainability. </span>
        
                    
             
        
        
        
Ribosomes attached to the ER
        
             
        
        
        
Answer: More than 99 percent of all organisms that have ever lived on Earth are extinct. As new species evolve to fit ever changing ecological niches, older species fade away. But the rate of extinction is far from constant. At least a handful of times in the last 500 million years, 75 to more than 90 percent of all species on Earth have disappeared in a geological blink of an eye in catastrophes we call mass extinctions.
Though mass extinctions are deadly events, they open up the planet for new forms of life to emerge. The most studied mass extinction, which marked the boundary between the Cretaceous and Paleogene periods about 66 million years ago, killed off the nonavian dinosaurs and made room for mammals and birds to rapidly diversify 
 
        
             
        
        
        
A because it pertains the the ecosystem
        
             
        
        
        
Fire naturally occurs in a grassland ecosystem and it helps the environment stay healthy and strong. I promotes richer soil as well as gets rid of excess leaves scattered around. After a fire, grassland ecosystems can grow again and be better than they were before.