Answer:
Nucleosomes in turn are wrapped into 30-nanometer fibers that form tightly packed chromatin. Histones prevent DNA from becoming tangled and protect it from DNA damage. In addition, histones play important roles in gene regulation and DNA replication. Without histones, unwound DNA in chromosomes would be very long.
 
        
             
        
        
        
Answer:
Interspecific competition is a competition between two species for obtaining the same resource. For example, lion and leopards are cat species but feed on the same prey so they compete for the same resource.
Interspecific competition may lead to resource partitioning through the change in their niche by one species to avoid interspecific competition.  
For example, <em>Anolis evermanni</em> and <em>Anolis gundlachi</em> are two species of lizards live on Puerto Rico island and compete for the same resource i.e., insects so to avoid interspecific competition they did the resource partitioning.
Anolis gundlachi feeds near the ground and  Anolis evermanni prey on upper branches of trees so in this way they avoid competetion.
 
        
             
        
        
        
The excess moisture ( water) in the food items boils up immediately and busts both shortening and water around.
<h3>Reaction between hot shortening and water</h3>
Shortening are known to be fats at room temperature and are usually used in the baking of cakes and bread.
When placed in the temperature that is high, it melts to become liquid. 
When you pour a food item that contains excess moisture on hot shortening, the water comes in contact with a higher temperature than the shortening's boiling temperature, so the water starts boiling immediately, and busts both shortening and water around.
Learn more about moisture here:
brainly.com/question/10398867
 
        
             
        
        
        
Answer: 
Ecosystem is the the name of the natural or artificial system in which living organisms interacts with the non-living physical environment. The living components are called as biotic factors which includes plants, animals, birds and human beings. The non-living components includes sunlight, temperature, weather conditions, water and soil. The living components of the ecosystem are dependent on non-living components for performing their biological functions like respiration, photosynthesis and others. 
 
        
                    
             
        
        
        
Valence is the number of electrons an atom must gain or lose in order to consummate its outer energy level or have a stable octet in its outer shell