Three cases happen when a light wave strikes an object. Light waves can either be: absorbed, reflected or refracted. The differences are as follows:
a. Absorption - light stops at the object causing it to appear dark or opaque.
b. Reflection - this could happen either in a smooth or rough surface. On a smooth surface, for example mirror or glass, light bounces off the surface at angle equal to the incoming light wave. On a rough surface e.g. earth, light bounces at many angles because the surface is uneven.
c. Refraction - light goes through the object and bends at an angle. Typical thing you see when diamond  or water is struck by light. 
        
             
        
        
        
Answer:
B
Explanation:
Any drug sold in the supermarkets, convenient stores etc  without prescriptions are called OTC-medication or over the counter drugs.
They are the group of drugs commonly abused  by young adults. Recommendation by  National Institute  on Drug Abuse is that , any  use of drug not related to medical purpose, but for mind-altering effects or arousal is regarded as an abuse. No doubt  these drugs are obtained over the counter because they are very easy to get, very cheap and legalized  by law to buy, thus easily accessible.
They drugs are high in contents which produces psychoactive effects when imbibed in over dose, and some may have damaging effects on the kidney and liver.
Other effects on the body physiology includes headaches, vomiting, nausea, seizures, tremors. etc.
 
        
                    
             
        
        
        
The spiders have became resistant to the pesticide.
        
             
        
        
        
I believe it’s B or D sorry I’m not 100% sure
        
             
        
        
        
It is <u>TRUE</u> that multiple polypeptides joined together represents the tertiary level of protein organization.