When we say biotechnology, this is when biological resources are being utilized for industrial and other purposes. And if we consider the benefits and impacts of applying this to clean those polluted water systems, the most likely impact would be, it will be harmful to sewage treatment plants. The answer is D.
        
                    
             
        
        
        
Answer:
Gap junctions within the intercalated disks
Explanation: Gap junctions within the intercalated disks allow impulses to be propagated from one cardiac muscle cell to another. It allows sodium, potassium, and calcium ions to flow between adjacent cells, propagating the action potential, and ensuring coordinated contractions.
 
        
             
        
        
        
Correct answer: D
A pollen is where male gametes are produced and so the number of chromosomes, as we are talking about gametes, is n. This means that the grain of pollen will only have a copy of each gene, and therefore only one allele for each gene - one S, and one T or t. So, the possible combinations are ST and St. 
        
             
        
        
        
True
The greater the object weighs (volume) the heavier it is, and it the object is heavier, the the buoyancy force will be higher
Hope this helps :)