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.
Which of these is found in the moss life cycle?
The moss life cycle consisting of 5 stages. The following structures are labeled clockwise:
spores, gametophyte, egg, zygote, and sporophyte
. The two labels indicate specific events in the life cycle. Fertilization is between the structures labeled egg and zygote.
In what phase do mosses spend most of their life cycle?
The familiar, green, photosynthetic moss plants are
gametophytes
. The sporophytegeneration is very small and dependent on the gametophyte plant. Like other bryophytes, moss plants spend most of their life cycle as gametophytes.
What is the first stage in the life cycle of mosses?
The life cycle of most mosses begins with the
release of spores from a capsule
, which opens when a small, lidlike structure, called the operculum, degenerates. A single spore germinates to form a branched, filamentous protonema, from which a leafy gametophyte develops.
How are the life cycles of mosses and ferns different?
Also, both mosses and ferns show alternation of generation. But,
the dominant phase of the life cycle of mosses is the haploid gametophyte generation, while the dominant phase of the life cycle of ferns is the diploid sporophyte generation
. Therefore, this is another important difference between mosses and ferns.
What do the moss life cycle and the fern life cycle have in common?
Both mosses and ferns have
gametophyte and sporophyte stages
in their life cycle.
How do the life cycles of mosses and gymnosperms differ?
The spore-bearing plants like the mosses and ferns rely on wind and water to disperse the spores from the sporophyte.
Gymnosperms (conifers) and angiosperms (flowering plants) don’t rely on water as much for dispersion of gametes
. Conifers (gymnosperms) are vascular seed-bearing plants that bear their seeds in cones.
What feature of the moss life cycle differs from the life cycle of other land plants?
All bryophytes have a dominant gametophyte stage in their life cycle. During this stage, the plant is haploid and the sex organs that produce the gametes are developed. Bryophytes are unique compared to many other plant species in that
they remain in this stage for long periods
.
How do mosses do gas exchange?
When the moss leaves are wet their entire surface is covered by a film of water. Gas exchange cannot happen through the water, but
the snorkels stick out above the water and are dry at the tips to allow for gas exchange
.
Why do mosses grow well in the Arctic tundra?
Why do mosses grow well in the Arctic tundra?
They grow better at cold temperatures
. They do not require moisture. They do not have true roots and can grow on hard surfaces.
What is leafy stage of mosses?
The leafy stage in some mosses
develops from a lateral bud in the secondary protonema
. It is a small leafy structure consisting of rhizoid, leaves and stem. It bears the sex organs antheridia and archegonia. Whereas, Protonema is the gametophytic phase of mosses directly develops from haploid spores.
How do mosses reproduce?
Moss sexually reproduces
by transmitting sperm (in the presence of water) from the male plant to the female
. The zygote forms a stalk (called seta) which hold spores in a small pod at its top.
What are the two generations of mosses life cycle?
Similar to plants, the moss lifecycle is completed in two distinct stages –
the gametophyte and the sporophyte
. The term that describes this type of life history is called alternation of heteromorphic generations. In vascular plants the dominant stage of this lifecycle is the diploid generation.
What do mosses and ferns produce in the first cycle?
In sexual reproduction, a haploid spore grows into a
haploid gametophyte
. If there is enough moisture, the gametophyte is fertilized and grows into a diploid sporophyte. The sporophyte produces spores, completing the life cycle.
Which of the following best describe a difference between mosses and ferns?
Both mosses and ferns are non-flowering, seedless plants. Ferns are more developed plants than mosses. The main difference between mosses and ferns is that
mosses are non-vascular plants whereas ferns are vascular plants
. Furthermore, the plant body of ferns is differentiated into true leaves, stem, and roots.
What do the moss life cycle and the fern life cycle have in common quizlet?
What do the moss life cycle and the fern life cycle have in common?
Fertilization produces a diploid cell
. In a plant’s life cycle, how many sporophyte generations occur between one gametophyte generation and the next time that eggs and sperm are produced?
How do mosses and ferns reproduce Brainly?
Ferns and mosses reproduce
by releasing millions of spores through the air
. The spores are fed eggs and are spread through the environment by wind.
How do mosses and ferns reproduce?
To reproduce sexually, mosses and ferns
produce sperm and eggs
. The motile sperm must be able to swim through water to reach and fertilize the eggs, which is why most mosses and ferns live in damp habitats.
What type of life cycle do all plants have?
All plants have a life cycle with
alternation of generations
. Plants alternate between diploid sporophyte and haploid gametophyte generations, and between sexual reproduction with gametes and asexual reproduction with spores.
What occurs in the life cycle of a moss but not in the life cycle of a gymnosperm?
1 Answer. In moss,
sperm and egg cells are produced after haploid spores are separated from the sporophyte plant
– occurs in the life cycle of a moss but not in the life cycle of a gymnosperm.
Which describes the life cycle of a plant that has an 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 characteristics of mosses?
Mosses have
green, flat structures that resemble true leaves, which absorb water and nutrients; some mosses have small branches
. Mosses have traits that are adaptations to dry land, such as stomata present on the stems of the sporophyte.
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…)
