AP BIOLOGY

Detailed explanation-1: -In the majority of algae and fungi, all structures are haploid except the zygote which is diploid. The haploid phase is called the gametophytic phase, whereas the diploid stage in the life cycle is called the sporophytic phase.

Detailed explanation-2: -Most fungi and algae employ a haploid-dominant life cycle type in which the “body” of the organism is haploid; specialized haploid cells from two individuals join to form a diploid zygote.

Detailed explanation-3: -In algae, as in plants, haploid cells in this stage are called gametophytes because they produce gametes.

Detailed explanation-4: -Haploid gametes are produced during meiosis, which is a type of cell division that reduces the number of chromosomes in a parent diploid cell by half.