It should be 3! That is the only logical answer to the question...
        
                    
             
        
        
        
I think you forgot to give the options along with this question. I have researched with the question and have found the options as well. Hope it helps you in your study. Among the choices that i have come up with, the option that says that temperate deciduous forests are less open than tropical rain forests.
        
                    
             
        
        
        
Answer: This mode of inheritance is known as Incomplete Dominance 
Explanation:
Incomplete dominance occurs when a cross between two contrasting alleles (such as Type A and B) produces a heterozygous phenotype different from the two parents. 
Thus, both Type A and B are dominant over Type O blood
 
        
             
        
        
        
Answer:
A) all living things are made of cells.
Explanation: 
Cell theory is presented by Matthias Schleiden in 1839. Cell theory states that "all the living organisms are madeup of one or more cells". Cell contains nucleus in the center which controls all activities of the cell. The organelles which are present in the cell are mitochondria, lysosomes, ribosome, cytoplasm, endoplasmic reticulum, golgi bodies and vacuoles. Every organelle has its own function.