According to Charles Darwin's Theory of Origin of Species, an organism either develops or losses an attribute according to its adaptation to survive in a competitive environment. This is same with humans or salamanders. The loss or the retention of limbs may indicate the survival purposes of the species.
        
                    
             
        
        
        
Answer:
1. A
2. B (although technically it is the pulmonary artery)
3. E
4. C
5. D
Explanation:
 
        
             
        
        
        
C) Hydra.
Hope this helps!
-Payshence xoxo
        
                    
             
        
        
        
Answer:
The correct answer will be option-D
Explanation:
Apoptosis is the process which leads to the death of the cell which is programmed and thus is known as the programmed cell death.
The death of a cell takes place when the cell experiences the lack of survival signals either due to the need to kill the cell or some genetic defects in DNA contained in cells.
The cell which undergoes apoptosis process can be easily marked by their shape as it gets shrunk, the cytoskeleton of the cell collapses, irregular bulges called blebs and the disassembly of the nuclear envelope.
Since the cell shrinks instead of swelling, therefore, option-D is the correct answer
 
        
             
        
        
        
Answer: since it is the same protein, it would have the same function as normal
Explanation: