Molecules with similar shapes have similar biological effects, because shape (structure) dictates effects (functions).
        
             
        
        
        
Answer:
b im pretty sure 
Explanation:
Population density is the average number of individuals in a population per unit of area or volume. For example, a population of 100 insects that live in an area of 100 square meters has a density of 1 insect per square meter.
 
        
             
        
        
        
The cartilaginous structures<span> that ring most mammalian tracheae are ... The </span>trachea<span> is</span>lined<span> with a moist mucous-membrane layer composed of </span>cells<span> containing small hairlike projections called </span>cilia<span>. ... </span>Such<span> outgrowths could </span>have<span> been useful to insects exposed by the drying up of a temporary aquatic.
IMPORTANT! * MARK AS BRAINLIEST </span><span>ANSWER !!!! *</span>
        
             
        
        
        
It would cause Rain. But a cold front. Fronts are always in relation to moving cold air A cold front is the advancing edge of a cold air mass and a warm front is the retreating edge of a cold mass. If the cold air mass is displacing the warm air front then the cold air is advancing. 
        
                    
             
        
        
        
I think the answer for this Question is DNA