In which period is the beginning of agriculture (plant cultivation) believed to have occurred?

The golden age of dinosaurs was in which of the following eras?

Match the following geological eras in Column $A$ with their respective time periods in Column $B$ and key evolutionary events in Column $C$. Which of the following is the correct match?

Column $A$	Column $B$ and $C$
$i$. Cenozoic	$2-65 \ \text{mya}$,Origin of vertebrates
$ii$. Palaeozoic	$500-165 \ \text{mya}$,Rise of egg-laying mammals
$iii$. Mesozoic	$135-225 \ \text{mya}$,Reptiles dominant
$iv$. Proterozoic	$350-500 \ \text{mya}$,Trilobites dominant

The following chart represents the evolutionary history of vertebrates through geological periods. What are the organisms $P$ and $Q$?

Evolutionary history of an organism is known as

Trilobites were evolved during which of the following periods?