Which of the following are haploid? Choose all appropriate solutions Antheridium Archegonium Egg cell Gametophyte Protonema Seta Spermatozoid Sporophyte Wall of spore capsule

The haploid choices are:<br /><br />* **Antheridium:** The antheridium is the male reproductive structure in bryophytes and some other plants. It produces haploid sperm.<br />* **Archegonium:** While the archegonium itself is part of the haploid gametophyte, the egg cell *within* it is also haploid.<br />* **Egg cell:** Egg cells are gametes and are always haploid.<br />* **Gametophyte:** The gametophyte is the haploid, gamete-producing phase of the plant life cycle.<br />* **Protonema:** The protonema is the thread-like chain of cells that forms the earliest stage of the gametophyte in mosses. Since it's part of the gametophyte, it's haploid.<br />* **Spermatozoid:** Spermatozoids (or sperm) are gametes and are always haploid. <br />