Which of the following is not included in the $Paleozoic$ era?

The Cretaceous period of the Mesozoic era is characterized by which of the following?

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?

In which period did giant reptiles dominate the earth?

The wrongly matched pair with respect to the organisms and their probable time of evolution is:

Dicotyledons first appeared during the ....... period.