In the origin of life, microspheres are most primitive protobiont, which have a membrane of
Lipids and proteins
Lipids
Carbohydrates
fats
During the origin and evolution of life, key biological compounds were progressively synthesised in ocean with the help of energy obtainable from
The principle of organic evolution envisages
There are two opposing views about origin of modern man. According to one view Homo erectus in Asia were the ancestors of modern man. A study of variation of $DNA $ however suggested African origin of modern man. What kind of observation on $DNA$ variation could suggest this
Most primitive living mammals which provide an evidence of organic evolution from geographical distribution are found in