A) A metal forms a + charged ion, so D2+
B) A nonmetal forms a - charged ion, so A-
C) C2-
D) B+
 
        
             
        
        
        
Answer:
The term biochemical is a contraction that refers to the consideration of biological, geological and chemical apect of each cycle. 
A nutrient reservoir is used to hold the water/ nutrient mixture plant need for strong growth and good health
Explanation:
<em>H</em><em>o</em><em>p</em><em>e</em><em> </em><em>T</em><em>h</em><em>i</em><em>s</em><em> </em><em>H</em><em>e</em><em>l</em><em>p</em><em>e</em><em>d</em><em> </em><em>You</em><em>!</em><em>!</em><em>!</em>
 
        
                    
             
        
        
        
Answer: 100% are round because they have the dominant trait (F)
 The second one is 0%
Explanation:
 
        
             
        
        
        
Answer:
operant conditioning
Explanation:
In operant conditioning, organisms learn to associate events that repeatedly happen together. The word "operant" should be changed to the word "classical." any relatively permanent change in behavior brought about by experience or practice.
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