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In plants that have alternation of generations the haploid spores are made by the?
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∙ 11y ago
gametes
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∙ 11y ago
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What is the name given to the life cycle of plants which includes a sporophyte generation and a gametophyte generation?
Plants exhibit alternation of generations that includes both diploid and haploid multicellular stages.The multicellular diploid stage is called the sporophyte and haploid stage is called gametophyte.
Alternation of generations refers to?
Alternation of generation refers to the life cycles of organisms that alternate between a haploid form that produces gametes that undergo sexual reproduction and a diploid form that produces spores that give rise to the haploid form.
What are the plants undergoing alternation of generation?
Gen 1 = The plant reproduces sexually Gen 2 = The offspring of that plant reproduce asexually and the cycle begins again, hence the name alternation ---Caveat--- This is a very simple explanation and surely there are exceptions and important details to consider depending on the exact species. For instance, triggers that can cause an alternation of generations, or sequences *how many times a the plant reproduces sexually/asexually before switching. Plant reproduction can be very complex! Good question. Just remember, all true plants will have alternating generations.
What is a gametophyte and sporophyte?
gametophyte: The gamete-bearing individual or phase in the life cycle of a plant having alternation of generations sporophyte: The spore-producing individual or phase in the life cycle of a plant having alternation of generations
What are the two stages of plant life?
Plants have what is called an alternation of generations in their life cycle. The two stages are called the sporophyte generation and the gametophyte generation. The sporophyte generation is diploid (has pairs of chromosomes). It produces spores by meiosis (reduction division), so the spores are haploid (contain only one chromosome from each pair). The spores divide by mitosis to produce a multicellular, haploid gametophyte generation. The gametophyte produces gametes (by mitosis) which fuse during fertilization to form a diploid zygote. This then develops into the sporophyte, completing the life cycle. The plants which we call mosses and ferns are the gametophyte generations. However conifers and flowering plants are the sporophyte generation of their life cycle. This is much easier to understand if you see a diagram.
What is the name given to the life cycle of plants which includes a sporophyte generation and a gametophyte generation?
Plants exhibit alternation of generations that includes both diploid and haploid multicellular stages.The multicellular diploid stage is called the sporophyte and haploid stage is called gametophyte.
What does gametophyte dominated mean?
Plants have an alternation of generations when they are in the gametophyte stage or the sporophyte stage. Gametes, which is haploid, or spores, which are diploid. Seedless vascular plants can be dominated by a haploid gametophyte stage where they are most of the time.
Alternation of generations refers to?
Alternation of generation refers to the life cycles of organisms that alternate between a haploid form that produces gametes that undergo sexual reproduction and a diploid form that produces spores that give rise to the haploid form.
Why do humans not go through alternation of generations?
Human beings do exhibit an alternation of generations, but the haploid phase is extremely deemphasized while the diploid phase is overwhelmingly dominant. The haploid phase in humans that results from meiosis is restricted to only one cell, either an egg in the female or a sperm in the male. There is never a multicellular haploid structure as there usually are in plants. If such a multicellular haploid structure is required for a true alternation of generations, then humans do not exhibit alternation of generations. The human organism grows by mitosis (the diploid phase) only after fertilization. A plant sporophyte is diploid and it produces spores by meiosis. Humans, like plant sporophytes, are diploid and make haploid gametes by meiosis.
What types of algae show a distinct alternation of generations?
Some types of algae that show a distinct alternation of generations are members of the green algae group, such as Ulva and Spirogyra. These algae have a haploid gametophyte generation and a diploid sporophyte generation. The gametophyte generation produces haploid gametes that fuse to form a diploid zygote, which develops into the sporophyte generation that produces haploid spores.
What are the plants undergoing alternation of generation?
Gen 1 = The plant reproduces sexually Gen 2 = The offspring of that plant reproduce asexually and the cycle begins again, hence the name alternation ---Caveat--- This is a very simple explanation and surely there are exceptions and important details to consider depending on the exact species. For instance, triggers that can cause an alternation of generations, or sequences *how many times a the plant reproduces sexually/asexually before switching. Plant reproduction can be very complex! Good question. Just remember, all true plants will have alternating generations.
What is a gametophyte and sporophyte?
gametophyte: The gamete-bearing individual or phase in the life cycle of a plant having alternation of generations sporophyte: The spore-producing individual or phase in the life cycle of a plant having alternation of generations
Do bryophytes produce seeds?
Yes, bryophytes produce pollen, but they also produce spores through alternation of generations. During the haploid (N) gametophyte stage of the pant's life, eggs and sperm are produced. The eggs are fertilized to form a diploid (2N) sporophyte plant which produces spores.
How are spores useful to some plants?
The spores produce gametophytic phase of the plant after germination to complete alternation of generation.
What are the two stages of plant life?
Plants have what is called an alternation of generations in their life cycle. The two stages are called the sporophyte generation and the gametophyte generation. The sporophyte generation is diploid (has pairs of chromosomes). It produces spores by meiosis (reduction division), so the spores are haploid (contain only one chromosome from each pair). The spores divide by mitosis to produce a multicellular, haploid gametophyte generation. The gametophyte produces gametes (by mitosis) which fuse during fertilization to form a diploid zygote. This then develops into the sporophyte, completing the life cycle. The plants which we call mosses and ferns are the gametophyte generations. However conifers and flowering plants are the sporophyte generation of their life cycle. This is much easier to understand if you see a diagram.
What plant stage produces spores?
Plants produce spores during the gametophyte, or haploid, stages. Spores are the sex cells for the plant. The spores will then germinate and produce new plants.
What is the diploid phase of a plant that produces spores?
The diploid form in a plant's life cycle is called the sporophyte. Land plants have a complex life cycle that involves an alternation of generations between a haploid gametophyte and a diploid sporophyte.
