Trilobites were evolved during which of the following period
Salvian
Cambrian
Ordovician
Pre-cambrian
(b)Trilobites and brachiopods were the most abundant animals evolved during the cambrian period.
A species is taxonomically
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
In which era Protozoa, sponge and algae were originated?
Photosynthetic bacteria evolved on earth about ……. million years ago
