Answer:
a) All Walnut , Genotype - RrPp
b) Walnut : Rose: Single
1:1:2
Explanation:
Phenotype and their Genotype - 
Walnut comb - R_ P_
Rose Comb - R_ pp
Pea Comb - rr P_
Single Comb  - rr pp
a) RR PP *  rr pp
All progenies will have genotype RrPp (Walnut Comb)
b) Rr Pp *  rr pp
RrPp (4), Rrpp (4), rrpp (8)
Walnut : Rose: Single
1:1:2
 
        
             
        
        
        
Due to white moths being in a dark environment (from environment changes), the moth has evolved its wings to become darker. Thus blending in with its environment to be less visible to birds. A way of survival. Their adaption is the darker wings to its dark environment
        
                    
             
        
        
        
usually, ionic bond occurs between metal and non metal
here Na is metal and Cl is non metal 
so bond in NaCl is ionic bond
 
        
                    
             
        
        
        
 A. Order, Arrangement, world and Universe
        
             
        
        
        
Answer:
Hydrosphere and Biosphere
Explanation:
The biosphere, also known as the "ecosphere", is the worldwide sum of all ecosystems (this would represented by the fish).
The hydrosphere is the combined mass of water found on, under, and above the surface of a planet earth, minor planet or natural satellite (this would be represented by the water).