Fish with stout and strong fins could move on land and go back to water. This was about: (in $mya$)

Which of the following represents the correct chronological order of geological eras?

As the horse evolved,there was a progressive reduction in the number of toes. Which of the following is the correct sequence in the evolution of the horse?

Which of the following plants evolved from Zosterophyllum?

Match List $I$ with List $II$:

List $I$	List $II$
$A$. Mesozoic Era	$I$. Lower invertebrates
$B$. Proterozoic Era	$II$. Fish and Amphibia
$C$. Cenozoic Era	$III$. Birds and Reptiles
$D$. Paleozoic Era	$IV$. Mammals

Choose the correct answer from the options given below:

Trilobites evolved during which period?