3. IV:height of drop DV:height of bounce CV: type of ball, place where ball is dropped, climate/wind
4. IV: battery type DV: time that it lasts CV: age of batteries, age of material (flashlights), type of materials (flashlights), size of batteries
5. IV:depth of water DV: temperature CV: amount of water in lake, temperature, climate/season
 
        
             
        
        
        
(4) organisms in a changing environment must adapt to acquire necessary traits and survive
        
                    
             
        
        
        
Answer:
Sandy Cheeks from Spongebob. I have absolutely no idea and I want to commit toaster in bathtub. 
Explanation:
 
        
             
        
        
        
A single stranded DNA  (oligonucleotides) can hybridize with (d) both complementary DNA and complementary RNA. 
DNA is the Deoxyribonucleic Acid. It is the genetic material present in majority of organisms. The nitrogenous bases present in DNA are: Adenine, thymine, Guanine and Cytosine.  DNA is a double stranded structure hence it forms hydrogen bonds with a complementary strand. The complementary strand can be of a DNA or RNA.
RNA is the Ribonucleic Acid. It also is a genetic material present in very few organisms. RNA is less stable than the DNA and may be either single stranded or double stranded. The nitrogenous bases of RNA are: Adenine Uracil, Guanine and Cytosine. 
To know more about DNA and RNA, here
brainly.com/question/3540768
#SPJ4
 
        
             
        
        
        
wearing glass to protect from uv rays