What was Marshall Nirenberg and Heinrich Matthaei’s contribution to our current understanding of the genetic code

The correct answer is discovery of codons. Marshall Nirenberg and Heinrich Matthaei experimentally deciphered the first out of 64 codons present in our biological system. ... So, it helped in decoding the first codon out of 64.

Explanation:

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.

thats not even an aswer choice