Answer:
Adding filter media, rocks, or substrate from an existing tank is one of the most effective things you can do to speed up the nitrogen cycle in your aquarium.
Explanation:
<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>