Answer:
Frogs with deformities that typically include missing limbs, extra limbs, partial limbs, limbs that are bent and contorted, or limbs that have little muscle, are malformed frogs. Most frogs are usually malformed because of the sensitivity to the environmental factors around them while growing out of the tadpole stage
 
        
             
        
        
        
D, different species in the world
        
             
        
        
        
Answer:
In biology, a molecular clock can be described as a method to determine the time for the divergence of species which occurred by the process of evolution. 
Explanation:
The mutation rates of different molecules are used in this method. The mutation rates for DNA sequences and amino acid sequences are usually considered. The molecular clock can be used to compare and estimate the splitting of a lineage. For example, by this method, one can interpret when the chimpanzees and humans diverged from each other.
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-Toshino
 
        
             
        
        
        
Hello friends
Perception...
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