Answer:
The correct answer will be option-thick bundles of fibers that allow communication between the brain’s hemispheres. 
Explanation:
Cerebral commissures are the thick fiber tract composed of white matter which connects the same cortical areas of the left and right hemispheres of the brain.
Commissural fibers include many types of fibers in which corpus callosum fibers are one of the types of fibers which act as the main Cerebral commissures.
Since these fibers connect the two hemispheres, therefore, they help in the communication between two hemispheres.
Thus, the selected option is the correct answer.
 
        
             
        
        
        
Answer:
4) Vacuole as it loses all the water
Explanation:
 
        
                    
             
        
        
        
Answer:
5.6L
Explanation:
Given parameters: 
number of moles  = 0.25mol
pressure on gas  = 1atm
temperature  = 273K
Gas constant R = 0.0821Latm/molK 
Unknown: 
Volume of gas  = ? 
Solution: 
Using the ideal gas equation, we can solve this problem. The equation is a combination of the three gas laws: Boyle's law, Charles's law and Avogadro's law. 
It is mathematically expressed as; 
              PV = nRT
where P is the pressure
            V is the volume 
           R is the gas constant 
           T is the temperature
           n is the number of moles 
All the parameters are in the appropriate units and we simply solve for the volume of the gas; 
 
                 1 x V = 0.25 x 0.0821 x 273
                       V  = 5.6L