What is the alternation of generations in mosses?
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.
What is alternation of generation with example?
The classic example is the mosses, where the green plant is a haploid gametophyte and the reproductive phase is the brown diploid sporophyte. The two forms occur together. In bryophytes and mosses, the gametophyte is the dominant generation and the sporophyte are sporangium bearing stalks growing from the gametophyte.
What is alternation of generation explain with diagram?
Alternation of generations is a term primarily used to describe the life cycle of plants. 2. A multicellular gametophyte, which is haploid with n chromosomes, alternates with a multicellular sporophyte, which is diploid with 2n chromosomes, made up of n pairs.
What is the process of alternation of generations?
Alternation of generations describes a plant’s life cycle as it alternates between a sexual phase, or generation and an asexual phase. The sexual generation in plants produces gametes, or sex cells and is called the gametophyte generation. The asexual phase produces spores and is called the sporophyte generation.
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.
Which of the following are parts of the gametophyte generation in mosses?
Unrestricted growth, as for example, in stems and roots. Which of the following are parts of the gametophyte generation in mosses: antheridia, zygote, embryo, capsule, archegonia, sperm cells, egg cell, spores, and protonema? How are mosses, liverworts, and hornworts similar? How is each group distinctive?
Why is it called alternation of generations?
The multicellular haploid plant structure is called the gametophyte, which is formed from the spore and give rise to the haploid gametes. The fluctuation between these diploid and haploid stages that occurs in plants is called the alternation of generations.
What is alternation of generations quizlet?
Alternation of Generations. This term refers to the life cycle of most plants in which the generations alternate between haploid gametophytes and diploid sporophytes. All embryophytes and some algae undergo this process.
What happens during alternation of generations in plants?
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.
What does alternation of generations mean quizlet?
What does the moss protonema of a moss develop from and what does it develop into?
When a moss first grows from the spore, it start as a germ tube which lengthens and branches into a filamentous complex known as a protonema, which develops into a leafy gametophore, the adult form of a gametophyte in bryophytes. Moss spores germinate to form an alga-like filamentous structure called the protonema.