Do mosses have dominant generations?
In bryophytes (mosses and liverworts), the dominant generation is haploid, so that the gametophyte comprises what we think of as the main plant. The opposite is true for tracheophytes (vascular plants), in which the diploid generation is dominant and the sporophyte comprises the main plant.
What are the stages in the life cycle of moss?
This consists of a stalk with a spore capsule attached to the parent moss plant. As the spore capsule matures it releases its spores into the air, and then dies. If moss spores fall in a damp place, they germinate and grow into leafy moss plants, and the cycle is completed.
What is the second generation produced in mosses?
Moss life cycle All land plants have alternating generations where one generation (the gametophyte generation) has half the genetic material as the second generation (the sporophyte). The gametophyte is produced when spores released from the sporophyte establish and begin dividing.
What is the dominant generation in mosses and ferns?
The sporophyte is the dominant generation, but multicellular male and female gametophytes are produced within the flowers of the sporophyte.
What generation is dominant in the moss life cycle?
haploid generation
In mosses, the dominant stage is the haploid generation (the gametophyte). This means that the green, leafy gametophytic tissue is haploid (has only one set of chromosomes).
What generation is moss?
What generation produces spores in the moss life cycle?
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. These spores (more…)
What is diploid generation?
In sporophyte. In the sporophyte phase a diploid (having two sets of chromosomes) plant body grows and eventually produces spores through meiosis. These spores divide mitotically to produce haploid (having a single set of chromosomes) gamete-producing bodies called gametophytes.
Which generation dominates the fern life cycle?
the sporophyte generation
The dominant part of the life cycle, i.e., the plant that is recognized as a fern, represents the sporophyte generation. The gametophyte generation includes the phase of the life cycle between the formation of spores by meiosis and fertilization and formation of the zygote.
Why do plants alternate generations?
The alternation of generations allows for both the dynamic and volatile act of sexual reproduction and the steady and consistent act of asexual reproduction. When the sporophyte creates spores, the cells undergo meiosis, which allows the gametophyte generation to recombine the genetics present.
Which generation is dominant in the moss life cycle quizlet?
The gametophyte is the dominant stage of the life cycle in both mosses and ferns.
Is the dominant generation for the mosses the gametophyte or the sporophyte?
In the most primitive plants, like mosses, the gametophyte is dominant (i.e. it’s big and green). In higher plants like ferns and fern allies, the sporophyte stage is dominant.