False. Specific gravity usually means relative density with respect to water. [ ]
        
             
        
        
        
Cell Membrane 
Hope this helps =]
        
                    
             
        
        
        
Answer:
Explanation:
Oil sand is an unconventional source of oil. It requires specialized technology and great expertise to win oil from associated waste materials. 
The reason why some companies bother about such oil source is explained below; 
- Prevailing cost of oil in the world market makes it profitable to extract these oil from sands. A high cost of oil crude oil is a good cause to produce oil form oil sands. 
- Development of new technology can catalyze interest in profitable exploration from unconventional sources. 
- Economic policies can also favor the production of this source of oil. 
- Demand for oil in the market can jack up production levels that can also be met by oil from oil sand. 
 
        
             
        
        
        
I think the answer should be:<span>D) Small Fish and other Aquatic Species
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In food pyramid, the biomass will be much lower in the higher level. In general, every level will have lower of mass/energy compared to the level below. Then, the greatest biomass should be found in the producer class. High-level consumer like bird or mammals should have the lowest mass. 
But it was inverted in aquatic, producer become the lowest mass so phytoplankton and zooplankton must be lowest. You should be able to exclude option A and C so it is either option B or D. Since B has zooplankton, I prefer to choose D
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The sequence of amino acids determines the protein