Angiosperms are divided into how many classes?

Which of the following subclasses does not contain any orders?

The diploid sporophyte is dominant in the life cycle of

Which of the following is included in the group of flowering plants?

Which is the correct option for the angiosperm plants having the following characteristics?
$i.$ Name of the plant with size $2-5 \ mm$
$ii.$ Name of the tallest plant
$iii.$ Name of the plant with the heaviest and largest flower
$iv.$ Name of the plant with the tallest and largest inflorescence

Which of the following has the maximum capacity for adaptation?