Nonvascular plants include mosses, liverworts, and hornworts. They are the only plants with a life cycle in which the gametophyte generation is dominant. ... The familiar, green, photosynthetic moss plants are gametophytes. The sporophyte generation is very small and dependent on the gametophyte plant.

What is the dominant generation in nonvascular plants?

All land plants have a life cycle with an alternation of generations between a diploid sporophyte and a haploid gametophyte, but in all non-vascular land plants the gametophyte generation is dominant.

In which plants sporophyte generation is dominant?

In bryophytes, such as mosses and liverworts, the gametophyte is the dominant life phase, whereas in angiosperms and gymnosperms the sporophyte is dominant.

Why is sporophyte generation dominant in vascular plants?

It is beneficial to have the sporophyte generation dominant in vascular plants because the sporophyte generation has the vascular tissue. ... The moss sporophyte is dependent on the gametophyte, which is the dominant generation.

Which is dominant gametophyte or sporophyte?

The sporophyte is the dominant generation, but multicellular male and female gametophytes are produced within the flowers of the sporophyte.

The Reproductive Lives of Nonvascular Plants: Alternation of Generations - Crash Course Biology #36

44 related questions found

What is a sporophyte generation?

In plants, the sporophyte generation is that phase in their life cycle that begins with the union of two single-celled haploid gametes. This union of haploid (n) gametes results in the formation of a single-celled diploid (2n) zygote. The zygote germinates and grows by going through a series of mitotic divisions.

Are mosses sporophyte dominant?

First, all plants undergo an alternation of generations, between a haploid gametophyte stage and a diploid sporophyte stage. 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.

Which of the following plants has a dominant gametophyte generation?

The correct answer is 3. "moss". Mosses belong to the group, bryophyta. All bryophytes have a dominant gametophyte stage in which structures...

Which generation is dominant in gymnosperms?

The gymnosperm life cycle has a dominant sporophyte generation. Both gametophytes and the next generation's new sporophytes develop on the sporophyte parent plant.

Is sporophyte a nonvascular?

Nonvascular plants include mosses, liverworts, and hornworts. ... The sporophyte generation is very small and dependent on the gametophyte plant. [Figure 2] Like other bryophytes, moss plants spend most of their life cycle as gametophytes.

Why is sporophyte dominant in Fern?

In vascular plants, the sporophyte generation is dominant. In seedless vascular plants such as ferns, the sporophyte releases spores from the undersides of leaves. The spores develop into tiny, separate gametophytes, from which the next generation of sporophyte plants grows.

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.

Are gymnosperms sporophyte dominant?

The life cycle of a gymnosperm involves alternation of generations, with a dominant sporophyte in which reduced male and female gametophytes reside. All gymnosperms are heterosporous.

What is the dominant generation of fern?

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.

Which stage is the dominant stage in mosses?

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).

Which of the following is gametophyte dominant?

The gametophyte is the dominant stage of the life cycle in both mosses and ferns. In both mosses and ferns, moisture is required for sperm to reach the egg.

How does the sporophyte generation of a plant differ from the gametophyte generation?

What is the difference between a Sporophyte and a Gametophyte? Sporophyte phase produces spores, while gametophyte phase produces gametes (egg and sperms). Therefore, sporophyte phase is asexual, while gametophyte phase is sexual.

Which of the following organisms have a dominant sporophyte generation and free-living gametophyte generation?

In seed plants, the sporophytic generation is dominant and free-living, and the gametophytes are very small and dependent on the sporophyte for nutrients. Among gymnosperms, conifers have male and female cones on the same tree. Other gymnosperms bear male and female reproductive structures on different individuals.

What is the first generation produced in mosses?

Mosses reproduce in an unusual way. There is a first generation moss, the gametophyte. The gametophyte produces a sperm and an egg. They come together and grow into the next generation, the sporophyte.

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.

Are liverworts gametophyte or sporophyte dominant?

The gametophyte stage is the dominant stage in both liverworts and hornworts; however, liverwort sporophytes do not contain stomata, while hornwort sporophytes do.

What is sporophyte dominant?

A sporophyte is a multicellular diploid generation found in plants and algae that undergo alternation of generations. ... In many plants, the sporophyte generation is the dominant generation. This means that the sporophyte is larger and lives longer than the gametophyte generation.

Which of these land plants have a dominant sporophyte phase?

An independent sporophyte is the dominant form in all clubmosses, horsetails, ferns, gymnosperms, and angiosperms that have survived to the present day.

In which of the following plants Gametophytic phase is dominant?

So, we can say that true mosses, liverworts, and hornworts (bryophytes) show the dominant phase of haploid gametophyte generation. Thus, the correct answer is option E.

Is the dominant stage in gymnosperms?

The dominant stage in gymnosperms is sporophyte.