I’m not sure if this is what you’re looking for. Is their any answer choices?
        
             
        
        
        
Answer:
The three types of symbiotic relationship are: mutualism, commensalism, and parasitism.
Example: 1.Mutualism: Pistol shrimps and gobies.
2. Commensalism: Sharks and Remora Fish. 
3. Parasitism:. Tapeworms, fleas, and barnacles.
 
        
             
        
        
        
Answer:
Human cells can readily absorb folic acid; bacteria cells cannot.
Explanation:
Bacterial cells cannot absorb folic acid and synthesize it. On the other hand, humans do not synthesize folic acid in their cells. They rather obtain it from the diet. Sulfa drugs, for example, sulfanilamide resemble p-aminobenzoate (PABA). PABA is a molecule that is used as a substrate in the synthesis of the coenzyme folic acid. The sulfa drugs serve as competitive inhibitors and compete with PABA for the catalytic site of an enzyme involved in the folic acid synthesis. This prevents the synthesis of folic acid in bacterial cells and thereby, inhibits bacterial growth.
 
        
             
        
        
        
Answer:
B
Explanation:
Warm because land gains heat faster than water when heated by the sun. The heated land then transfers the heat to the atmosphere. The air mass is dry becasue a continent is mainly land and very little water (unlike oceans). There is, therefore, very little moisture in the continental tropical air mass.