Meaning: A dark color or material obtained by heating organic matter or wood.
        
                    
             
        
        
        
Well for both of them to survive they need oxygen, food, water amino acids, and a way to leave waste, but that depends on the type of cell
        
             
        
        
        
Answer:
Dead zones are hypoxic (low-oxygen) areas in the world's oceans and large lakes, caused by "excessive nutrient pollution from human activities coupled with other factors that deplete the oxygen required to support most marine life in bottom and near-bottom water. (NOAA)".
Explanation:
 
        
                    
             
        
        
        
Food webs with fewer species are more sensitive to the loss of species and ecosystem disturbances
        
             
        
        
        
Seedless plants genetically alternate between generations.
<h3>What is the reproduction cycle of seedless plants like?</h3>
All seedless vascular plants have very similar life cycles. As in bryophytes, their life cycle has two alternating generations:
-  the gametophyte 
- and the sporophyte. 
- The sporophyte is always the dominant and free-living generation.
With this information, we can conclude that seedless plants genetically alternate between generations.
Learn more about Seedless plants in brainly.com/question/10715162
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