What does dominant generation mean?

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 generations of bryophytes?

gametophyte
In bryophytes the long-lived and conspicuous generation is the gametophyte, while in vascular plants it is the sporophyte.

What does gametophyte dominant mean?

The character and relative extent of the two phases vary greatly among different groups of plants and algae. Thus, the gametophyte stage is dominant in the more primitive (nonvascular) plants (bryophytes), whereas the sporophyte is the dominant phase in the life cycle of higher (i.e., vascular) plants.

What does dominant phase mean?

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).

Are bryophytes sporophyte dominant?

During the course of evolution, the sporophyte stage has become progressively increased. Thus, in the higher (i.e., vascular) plants the sporophyte is the dominant phase in the life cycle, whereas in the more primitive nonvascular plants (bryophytes) the gametophyte remains dominant.

What is alternation of generation explain with bryophytes?

Alternation of generations is a life-cycle involving two phases of life, which regularly alternate with each other. In Bryophytes, the first phase is the gametophytic phase, in which gametes are produced, that contain half the number of chromosomes.

Why are bryophytes gametophyte dominant?

Sporophytes produce haploid spores by meiosis, that grow into gametophytes. Bryophytes are gametophyte dominant, meaning that the more prominent, longer-lived plant is the haploid gametophyte. In liverworts the meristem is absent and the elongation of the sporophyte is caused almost exclusively by cell expansion.

What does dominant generation mean in plants?

sporophyte
The sporophyte is the dominant generation, but multicellular male and female gametophytes are produced within the flowers of the sporophyte. The embryonic sporophyte develops within the archegonium, and the mature sporophyte stays attached to the gametophyte. The sporophyte is not photosynthetic.

What is alternation of generation in bryophytes?

What is alternation of generations describe how bryophytes exhibit this phenomenon in their life cycle?

Complete answer: In bryophytes, when the two generations are morphologically different, then the type of alternation of generations is known as heteromorphic. The haploid phase (n) is known as the gametophyte or sexual generation. It has the sexual reproductive organs which produce gametes, i.e., antherozoids and eggs.

Which generation is well developed in bryophytes?

What is alternation of generation describe alternation of generation in Bryophytes?

Which is the dominant generation in a bryophyte?

The dominant generation in bryophyte is gametophyte. The vegetative plant body is a gametophyte. It has smaller size. Plant body: The plants are multicellular. They have simple thallus. Some may be differentiated into simple leaves and stem. Vascular tissues (xylem and phloem) are absent. Roots are absent.

How are bryophytes different from other land plants?

Paraphyletic view. Compared to other living land plants, they lack vascular tissue containing lignin and branched sporophytes bearing multiple sporangia. The prominence of the gametophyte in the life cycle is also a shared feature of the three bryophyte lineages (extant vascular plants are all sporophyte dominant).

Why is gametophyte dominant in Moss and liverworts?

Alternation of 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. Read in-depth answer here.