Question

Briefly explain the molecular clock hypothesis.

29 Jan 2026
Answer :
Word Count : 246
The molecular clock hypothesis is a concept in molecular evolution which proposes that genetic mutations accumulate at a relatively constant rate over time. According to this hypothesis, the number of molecular changes or substitutions in the DNA, RNA, or protein sequences between two species can be used to estimate the time since their last common ancestor. This approach assumes that mutations occur randomly but at a steady rate across generations, allowing
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