Answer: Bottom layer of rock
Explanation:
The bottom layer is the layer of the deposition of the sediments in which sedimentation and cementation occurs to form the rocks. These rocks are formed at the lowest horizon of the soil profile. These rocks are also called bedrocks. The layer present above the rock are younger and the layer at the top is the youngest layer. The older layer at the bottom and the younger layer at the top. This phenomena is called law of superimposition. 
 
        
             
        
        
        
Answer:
Birds and bats have homologous limbs because they are both ultimately derived from terrestrial tetrapods, but their flight mechanisms are only analogous, so their wings are examples of functional convergence.
 
        
                    
             
        
        
        
I believe ATP is the compound that does most of the work to carry out cell processes.
        
             
        
        
        
Answer:
D. the eggs are only viable for fertilization
 
        
                    
             
        
        
        
Answer:
The diversity of life has generally been divided into a few — four to six — fundamental 'kingdoms'. The most influential system, the 'Whittaker' five kingdom structure, recognises Monera (prokaryotes) and four eukaryotic kingdoms: Animalia (Metazoa), Plantae, Fungi and Protista .
Explanation:
hope it will help you