Organic compounds first evolved in earth required for origin of life were
Urea and amino acids
Proteins and nucleic acids
Proteins and amino acids
Urea and nucleic acids
Assertion : Among the primates, chimpanzee is the closest relative of the present day humans.
Reason : The banding pattern in the autosome numbers $3$ and $6$ of man and chimpanzee is remarkably similar.
The age of rock is calulated on the basis of
Brow spot in frog is
Which of the following statements is not true for retroviruses