Table of Contents
Are spores gametophyte or sporophyte?
The multicellular diploid plant structure is called the sporophyte, which produces spores through meiotic (asexual) division. The multicellular haploid plant structure is called the gametophyte, which is formed from the spore and give rise to the haploid gametes.
Are the spores produced by the moss sporophyte formed?
Are the spores produced by the moss sporophyte formed by meiosis or mitosis? The spores of the sporophyte are produced by meiosis.
What generation do moss spores give rise to?
haploid gametophyte
A spore gives rise to a haploid gametophyte, completing the cycle.
Are spores produced in gametophyte?
A gametophyte (/ɡəˈmiːtəˌfaɪt/) is one of the two alternating multicellular phases in the life cycles of plants and algae. It is a haploid multicellular organism that develops from a haploid spore that has one set of chromosomes. The gametophyte is the sexual phase in the life cycle of plants and algae.
Is the moss life cycle gametophyte or sporophyte dominant?
Nonvascular plants include mosses, liverworts, and hornworts. They are the only plants with a life cycle in which the gametophyte generation is dominant. Like other bryophytes, moss plants spend most of their life cycle as gametophytes. Find the sporophyte in the diagram.
How are moss sporophyte formed?
The moss life cycle follows the pattern of alternation of generations where gametophytes form male and female gametophores, which fertilize to form the sporophyte; spores are released from the sporophyte to produce new gametophytes.
Are the spores produced by the moss sporophyte formed by meiosis or mitosis are they haploid or diploid 5 points?
Both the spores and the resulting gametophyte are haploid, meaning they only have one set of chromosomes. The mature gametophyte produces male or female gametes (or both) by mitosis. The fusion of male and female gametes produces a diploid zygote which develops into a new sporophyte.
What is the sporophyte generation?
Definition of sporophyte : the diploid multicellular individual or generation of a plant with alternation of generations that begins from a diploid zygote and produces haploid spores by meiotic division — compare gametophyte.
What is produced by the sporophyte generation?
The sporophyte produces spores (hence the name) by meiosis, a process also known as “reduction division” that reduces the number of chromosomes in each spore mother cell by half. The fusion of male and female gametes produces a diploid zygote which develops into a new sporophyte.
Why is gametophyte dominant in moss?
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). Second, all plants need to get water to their cells.
What does the gametophyte of moss called?
There are two different developmental stages of the gametophyte: the protonema, and the gametophore. The protonema is the first part of the moss that develops from the germinating spore. The protonema will eventually produce leafy shoots called gametophores. The gametophores are the most conspicuous part of the moss.
What is the difference between male and female gametophyte?
Definition. Male gametophyte refers to the life stage of heterosporous plants which produces male gametes while female gametophyte refers to the life stage of heterosporous plants which produces female gametes.
What makes up a sporophyte?
A sporophyte (/spɔːroʊˌfaɪt/) is the diploid multicellular stage in the life cycle of a plant or alga. It develops from the zygote produced when a haploid egg cell is fertilized by a haploid sperm and each sporophyte cell therefore has a double set of chromosomes, one set from each parent.
What is a haploid gametophyte?
Haploid gametophyte. haploid gametophyte. The part of the life cycle of plants having haploid nuclei and giving rise to the sex cells that on fusing produce a diploid stage, usually the sporophyte.
What is the definition of gametophyte generation?
What is a Gametophyte. A gametophyte is the multicellular, haploid generation that is produced during the alteration of generations of plants and algae. It begins with a haploid spore and produces gametes in gametangia by mitosis.