Final answer:
The haploid structures among the given options are the gametophyte, spores, and the egg.
Step-by-step explanation:
The structures that are haploid are the gametophyte, spores, and the egg. A zygote (A) is the result of the fertilization between an egg and a sperm, which are both haploid, forming a diploid cell. As such, a zygote is not haploid. The gametophyte (B) is the stage in the plant life cycle that is haploid and produces gametes through mitosis. Sporophyte (C), on the other hand, is the diploid phase that produces haploid spores (D) by meiosis. These spores then develop into the haploid gametophyte. The egg (E) is one of the gametes produced by the gametophyte and is therefore haploid. The correct options that are haploid structures are B) Gametophyte, D) Spores, and E) Egg.
The structures that are haploid in the given options are the Gametophyte, Spores, and Egg.
The Gametophyte is the haploid stage in the life cycle of plants where gametes are produced. It is the sexual stage that gives rise to the male and female gametes.
Spores are also haploid. They are produced by the sporophyte through meiosis and are capable of developing into new gametophytes.
An Egg is a haploid structure produced by the female gametophyte. It is fertilized by the sperm to form a diploid zygote and initiate the sporophyte stage.