The answer is B). Genetic screening basically testing for the genetic traits of an individual. Therefore the answer would be B). 
        
             
        
        
        
The data given are 
            melting point            density 
<span>Zinc        419.53 oC              7.134 
Nickel      1455oC                 8.912 
Copper  1084.62oC              8.96 
Silver       	961.78oC           10.501 
Gold        1064.18oC          19.282
density is the mass per unit volume. Melting point is determined by the intermolecular forces between particles in the solids.
We </span>have been asked to find which cube weighs the most 
density = mass/volume 
when volume is constant for all the metals, then density is directly proportional to mass. Therefore metal with highest density has the highest mass.
from the given metals, metal with highest density is Gold.
correct answer is Gold.
        
                    
             
        
        
        
Every organism has a unique ecosystem within which it lives. This ecosystem is its natural habitat. This is where the basic needs of the organism to survive are met: food, water, shelter from the weather and place to breed its young. All organisms need to adapt to their habitat to be able to survive.
 
        
             
        
        
        
A few various areas which differ from each other 
- Prophase i has homologous chromosomes involved whereas Phrophase ii has individual chromosomes involved 
- Phrophase i only occurs in diploid cells whereas ii occurs in haploid cells 
These are the only important points I can differentiate them with. Hope it helps :)
        
             
        
        
        
I think it is because the cold air is more dense than the hot air so the less dense air which is the warm air rises