Meiosis takes place in the tiny saprophyte stage of bryophytes, which are attached to and dependent on the much larger gametophyte stage. The saprophytes create spores by meiosis, which disperse by wind and water to form new gametophytes. Fertilized eggs in gametophytes form saprophytes at the site of fertilization.
Where does meiosis occur in a moss?
Meiosis takes place in a specialized structure on the sporophyte (the sporangium), producing spores (not gametes!). The spores divide and produce male or female gametophytes. The sporophyte of mosses: a dependent stage. The sporophyte phase of mosses remains attached to the female gametophyte.
When and where does meiosis takes place in mosses?
spore mother cell within the sporangium meiosis take place in mosses.
Does meiosis occur in moss?
Life cycle of a moss (genus Polytrichum). The sporophyte generation is dependent on the photosynthetic gametophyte for nutrition. Cells within the sporangium of the sporophyte undergo meiosis to produce male and female spores, respectively.
What is the life cycle of moss?
The life cycle of a moss, like all plants, is characterized by an alternation of generations. A diploid generation, called the sporophyte, follows a haploid generation, called the gametophyte, which is in turn followed by the next sporophyte generation.
Do mosses have rhizoids?
Mosses are flowerless plants that grow in clumps. They don’t have roots. Instead they have thin root-like growths called rhizoids that help anchor them. Because they don’t have roots and stems to transport water, mosses dry out very quickly, so they are usually found in moist habitats.
How do mosses perform gas exchange?
Mosses have to drink and breathe through their “skin”. … When the moss leaves are wet their entire surface is covered by a film of water. Gas exchange cannot happen through the water, but the snorkels stick out above the water and are dry at the tips to allow for gas exchange.
What is meiosis and where does it occur?
Meiosis is the process of cells splitting into four haploid cells, thus reducing the chromosome number by half in each cell. … Meiosis occurs in the sex cells, so the sperm and egg cells in the human body, to create even more of themselves.