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a
a method to determine amino acid sequences in proteins.
b
a technique called DNA fingerprinting.
c
a hypothesis to explain the importance of species in ecosystem.
d
a method to determine the biochemical nature of genetic material.
answer is A.
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Detailed Solution
Frederick Sanger is credited for developing method for determination of amino acid sequences in proteins.The proof that DNA is the genetic material came from the experiments of Alfred Hershey and Martha Chase.Paul Ehrlich gave the hypothesis to explain the importance of species in ecosystem.Alec Jeffreys developed the DNA fingerprinting technique.