Answer: A Microtubules 
Explanation: The cytoskeleton is composed of at last three different types of fibers: microtubules, microfilaments, and intermediate filaments. These fibers are distinguished by their size with microtubules being the thickest and microfilaments being the thinnest. 
 
        
             
        
        
        
A representation of earths rounded surface on a flat surface is called___a map.
        
             
        
        
        
Answer:
liquid- enzymes 
protein- fat
carbohydrate- saccharides 
nuclei acid- dna or deoxyribonucleic acid
 
        
             
        
        
        
Answer:
Nothing
Explanation:
They have no common attributes
 
        
             
        
        
        
Answer:
Option-C
Explanation:
The sugar alcohols are the carbohydrates which are neither considered sugars nor alcohols but they partially resemble the structure of both of these sugars and alcohol.
The sugar alcohols are naturally present in the vegetables and fruits but they are also artificially synthesised like xylitol, lactitol, mannitol and others.
They are considered the alternative from of sugar but they provide less energy as compared to carbohydrates like they provide about 0-3 kcal per gram whereas sugar provides 4 kcal per gram.
This difference is due to the reason that they are not completely absorbed by the human body and also they are incompletely metabolized therefore provide less energy.
Thus, Option-C is the correct answer.