Please help its due in 2 mins

A) The continents were at one point a single large landmass

Explanation:

This is the most probable event and is a common fact. You see many different habitats have the same properties but are in two different places.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.