Are gemmae produced by mitosis or meiosis?
haploid spores germinate (mitosis) into haploid thallus (n), the gametophyte, which can reproduce asexually by gemmae cups containing gemmae or sexually with gametangiophores. fertilization of egg by sperm produces a diploid zygote (2n) which divides by mitosis into new sporophyte.
What is gemmae in biology?
Gemmae are a means of asexual reproduction found in many bryophytes. gemmae are 1 to many celled, specially produced clonal plant fragments. gemmae are variously dispersed (e.g. by wind, water) and are capable of growing into new plants. …
What are gemmae and what is their function?
Functions : Gemmae means of asexual propagation in plants. These structures are commonly found in fungi, algae, liverworts and mosses. A gemma (plural gemmae) is a single cell that detaches from the parent and develops into a new individual.
Are gemmae unicellular or multicellular?
Gemmae are green multicellular asexual buds, which develop in small receptacles called gemma cups located on the thalli. Gemmae become detached from parent body and germinate to form new individuals.
Are gemmae multicellular?
Gemmae are multicellular green structures for vegetative propagation.
What is gemmae in biology class 11?
Gemmae are green, multicellular, asexual buds, which develop in small receptacles called gemma cups located on the thalli. The sporophyte is differentiated into a foot, seta, and capsule. After meiosis, spores are produced within the capsule, the spores germinate to form free-living gametophytes.
Are gemmae spores?
is that gemma is (label) bud; an asexual reproductive structure, as found in liverworts and hydra, able to produce new individuals from a cluster of cells while spore is a reproductive particle, usually a single cell, released by a fungus, alga, or plant that may germinate into another.
How are the gemmae dispersed?
The gemmae are dispersed when water droplets fall into the splash cups; the shape of the cup makes the water splash out, and it takes some gemmae with it, carrying them far away from the parent plant.