Answer:
1. Maintain the chromosome number of a species over generations.
2: Impart genetic variations that serve as raw material for evolution.
Step-by-step explanation:
Meiosis forms haploid gametes in sexually reproducing organisms which in turn fuse to form diploid zygote. Without meiosis, the number of chromosomes would have doubled with each round of reproduction. Crossing over during meiosis generates new gene combinations which may confer survival advantage to the species. The genetic variations also serve as raw material for evolution.