When two plates converge, what happens depends on the types of lithosphere that meet. The three possibilities are oceanic crust to oceanic crust, oceanic crust to continental crust, or continental crust to continental crust. If at least one of the slabs of lithosphere is oceanic, that oceanic plate will plunge into the trench and back into the mantle. The meeting of two enormous slabs of lithosphere and subduction of one results in magma generation and earthquakes<span>. If both plates meet with continental crust, there will be </span>mountain building<span>. Each of the three possibilities is discussed in a different concept. https://www.ck12.org/earth-science/ocean-continent-convergent-plate-boundaries/lesson/Ocean-Continen...
<span>Haploid and diploid life cycle.
Haploid male and female cells form together to create a diploid zygote, however when spores or seeds are released (depending on the type of plant) these are once again haploid cells - hence the cycling between cell states.</span>