Question

Read the following passage and answer the questions that follow. According to evolutionary theory, every evolutionary change involves the substitution of a new gene for the old one and the new allele arises from the old one. Continuous accumulation of changes in the DNA coding for proteins leads to evolutionary differences. The chemical composition of DNA is basically the same in all living beings, except for differences in the sequence of nitrogenous bases. Given below are percentage relative similarities between human DNA and DNA of other vertebrates :

Read the following passage and answer the questions that follow. The most convincing evidence to trace evolutionary relationships between humans and different groups of animals come from the basic similarities seen at the molecular level. Study the table given below that depicts the number of amino acid differences between the haemoglobin polypeptide of few animals with that of humans and answer the questions that follow. | S.No. | Animal | No. of amino acid differences in haemoglobin with that of humans | |-------|--------|------------------------------------------------------------------| | 1. | Macaque | 08 | | 2. | Dog | 32 | | 3. | Bird | 45 | | 4. | Frog | 67 | | 5. | Lamprey | 125 |