1. Meiosis is the process that reduces the number of chromosomes from diploid (2n) to haploid (n). What process is responsible for restoring the diploid number of a species?
mitosis, gamete fusion or zygote formation are all apart of mitosis. mitosis is the spitting of on cell to create two cells. it replicates all of its chromosomes to create an identical dna sequence with its daughter cell. it them uses gamete fusion to split in half. mitosis is basically an antonym of meiosis as meiosis uses chromosomes from both parent cells while mitosis only uses chromosomes from one. this is why we would label mitosis in cells that are asexual.
Fertilization (if it's used in terms of species that produce eggs and sperm), or gamete fusion. However, those are NOT considered to be part of mitosis. Mitosis is a SEPARATE process from meiosis and fertilization, but it can occur AFTER fertilization occurs to increase the number of cells available to form the organism (and it usually does too).