Answer: Single covalent bond in the long hydrocarbon chain.
Saturated fatty acids are long chains of hydrocarbon ( with single covalent bond) ending with the carboxylic group (-COOH). This means those fatty acids which possess only single bonds in their chemical structure are called as saturated fatty acids. They are densely packed, which makes them solid at room temperature.  
Example- Lauric acid ( present in coconut oil). It has 12 carbon atoms in its chemical structure.
 
        
                    
             
        
        
        
I think it is from the Paleozoic era
Hope this helps
        
                    
             
        
        
        
Answer: The correct answer would be gene pool.
Explanation:
Gene pool refers to the sum of all the alleles in an individual.
The allele refers to the alternate forms of the gene.
Large population usually has more genetic diversity as compared to small population. Variation in gene pool is essential for survival of a population.
 
        
             
        
        
        
If you are asking if that is true or false, it is false because all fungus like protists are heterotrophs, not autotrophs
        
             
        
        
        
Answer:
What is this?
Explanation:
Well Ik what it is, but what happens when I look it up??
???