These biomoleules are found in following cellular structures. 
<span>Carbohydrates- Cell wall, Golgi apparatus </span>
<span>Proteins- Plasma membrane, Endoplasmic reticulum, nucleus, cytoplasm, mitochondria, chloroplast etc. </span>
<span>Lipid- Plasma membrane, cytoplasm </span>
<span>Nucleic acid- Nucleus, chromosomes, mitochondria, chloroplast, ribosomes.</span>
        
             
        
        
        
It carries deoxygenated blood from the right ventricle to the lungs
        
                    
             
        
        
        
Answer:
a. food pellet
Explanation:
In classical conditioning, an unconditioned stimulus is the stimulus that naturally elicits an unconditioned response. The unconditioned stimulus is usually paired with a neutral stimulus, and after pairing with a neutral stimulus, the neutral stimulus becomes a conditioned stimulus that elicits a conditioned response alone.
In the experiment described above in the question, <em>the unconditioned stimulus is the food pellet,</em> which naturally elicits the response of the rat to wait at the far left corner of the cage. The neutral stimulus which is paired with the food pellet is the vanilla scent, which now becomes the conditioned response, when paired alone.
 
        
             
        
        
        
Answer:B. 
It was used to prove that smoking causes health problems.
Explanation:
 
        
                    
             
        
        
        
Answer:C
Explanation:
Foreign leaders helped train and fought for the Continental Army