Answer:Darwin realized that existing heritable variation in a generation must be the starting point for a change in nature. In any generation, the animals in the litter are never quiet the same. And in the wild,such a tiny heritable variation might make all the difference between life and death.
Explanation:
C. Competition: fight between the two animals over food or any resource
5'-ACTCGTGA-3'-frameshift mutation (number of nucleotides in a DNA sequence is not divisible by three). deletion, one nucleotide in DNA is deleted, in this case A
5'-ATTACGTGA-3'- base substitution, C is substituted with T
5'-ACTACGTGT-3'- base substitution, A is substituted with T
5'-ACTAAGTGA-3'- base substitution, C is substituted with A
Substitution is a type of mutation in whichonly one base is changed. They can be:
• Nonsense mutations-when substitution leads to the formation of a stop codon instead of a codon
• Missense mutations-when one nucleotide is substituted and a different codon is formed
• Silent mutations-when a nucleotide is substituted and the same amino acid is produced
somatic mutations can be inherited from parents
Answer:
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