The secondary structure is responsible for the shape that the nucleic acid assumes. The bases in the DNA are classified as purines and pyrimidines. ... A purine base always pairs with a pyrimidine base (guanine (G) pairs with cytosine (C) and adenine (A) pairs with thymine (T) or uracil (U)).
 
        
             
        
        
        
Answer:
B) the relative deprivation principal.
Explanation:
Based on the information provided within the question it seems that Arthur's experience is best explained in terms of the relative deprivation principal. This principle basically explains the behaviors and actions of someone that believes that they deserve something that others possess. Which seems to be the case with Arthur, since he believes that he deserves a B or A solely because all his classmates got those grades.
 
        
             
        
        
        
Answer:
lysosomes, small molecules 
Explanation:
-plants:usually not evident Animals: occurs in cytoplasm
-small organelles filled with enzymes 
-"clean up crew" 
- the digestion or breakdown of lipids, carbs, and small proteins into small molecules that can be used by the rest of the cell 
-involved in breaking down organelles that have outliveed their usefullness 
-diseases are trace to lysosomes that dont function properly
 
        
             
        
        
        
I think the hydra lacks the specialized cells for touch and chemical detection. On the other hand earthworms have touch, light, vibration and chemical receptors along the entire body surface. Both of them are invertebrates (those animals without a backbone), they include insects, worms, jelly fish, spiders among other animals.