Answer:
Scientists estimate that at least 99.9 percent of all species of plants and animals that ever lived are now extinct.
Explanation:
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Some stimuli act as attention-getting stimuli due to their physical characteristics; others, due to their meaningfulness, act as attention-holding stimuli.
For example, somebody's physical appearance, of a person who is attractive, is used as an attention-getting stimuli, but their psychological qualities are what hold your attention due to their meaningfulness. 
        
             
        
        
        
Answer: after organelles it cells,tissues,organs,organ system then it give you the last one which is organism. 
Explanation:
 
        
             
        
        
        
Answer:
Biology is the study of life, while physics are the study of matter and energy used to determine how the universe behaves.