The answer is A. 0.54. 
In a population p+q=1 (we have 2 alleles only). 
The question states that 0.21 of the population(21%) have short legs meaning they are q^2. 
So q=rad0.21=0.4582. 
And p=1-q=0.5417.
        
                    
             
        
        
        
 This discovery demonstrated one of the strengths of Models may be used to expect or provide an explanation for occasions is the statements as it should be describe models in technological know-how.
<h3>What is the importance of models?</h3>
Models have usually been vital in technological know-how and stay used to check hypotheses and expect information. Often they may be now no longer correct due to the fact the scientists of the models.
- Scientific modeling is likewise referred to as a systematic activity. The goal of the modeling can apprehend easier, define, quantify, visualize. 
-  Normally Science is a topic which can not genuinely provide an explanation for furthermore it's miles to be interpreted.
- There are one-of-a-kind sorts of gift a number of them are mathematical , graphical fashions, operational , etc.
- Scientific are growing withinside the fields of technological know-how schooling and Philosophy of schooling.
Read more about the models:
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Answer:
ecosistema terrestre es una comunidad de organismos y su ambiente que ocurre solo en masas de tierra, como continentes o islas. Ecosistemas terrestres. Tundra. Taiga. Bosque templado
 
        
             
        
        
        
Answer:
A
Explanation:
insecticides are safe to use