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As land plants evolved what generation become more dominant A Gametophyte B Sporophyte C both D neither?
Wiki User
∙ 12y ago
In lower plants gametophytic generation was dominant and as the evolution progressed the gametophytic generation became progressively reduced and ultimately became dependent on sporophytic generation. Thus as the evolution progressed sporophyte become more dominant.
Wiki User
∙ 12y ago
Eva Buenrostro
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How have the sporophyte and gametophyte changed as plants have evolved?
The gametophyte has become smaller, and the sporophyte has become larger. To begin with main plant body was gametophytic and sporophyte was dependent on it. Later on, as the evolution progressed, both gametophyte and sporophyte became independent and ultimatly gametophyte became dependent on sporophyte.
Which generation of mosses are the photosynthetic?
The first generation of mosses starts with germination of spores to develop into gametophyte. The male and female gametophytes produce anthridia and archegonia. Motile antherozoids are released from anthridia and make their way to archegonia through water. The egg inside archegonium is fertilized to form the zygote. The zygote develops into a sporophyte, which remain dependent on the gametophyte.
What process allows some protists to increase their genetic variability?
1. Asexual reproduction is based on mitosis in eurkaryotic organisms on fission in bacteria and archaea. It results in offspring that are genetically identical to the parent.2. Sexual reproduction is based on meiosis and fusion of gametes. It results in offspring that are genetically different from their parents from each other.3. Sexual reproduction evolved in protists and this evolution ranks among the most significant evolutionary innovations observed in eurkaryotes.4. Alternation of generations: alternation of multicellular haploid (gametophyte) and diploid (sporophyte) forms. When alternation of generations occurs, a spore divides by mitosis to form a haploid, multicellular gametophyte. The haploid gametes produced by the gametophyte then fuse to form a diploid zygote, which grows into the diploid, multicellular sporophyte.
What is evolution mean?
Evolution can be just a noun derived from the verb 'to evolve'. It means to develop, to change... There is an evolution of everything in this sense; evolution of language, evolution of one's knowledge of a book's characters as one progresses through a book, evolution of a garden as one plants more things, evolution of this answer as I progress through writing it, evolution of the sort of questions asked on WikiAnswers... However, the questioner most probably desires an explanation of biological evolution. This is known as the Theory of Evolution and Darwinism. It was made famous by its hypothesiser Charles Darwin. Since its hypothesis state it is now the greatest underlying theory of biology. It explains, along with its mechanism of Natural Selection, how organisms change over time. Gene frequencies change in populations of eukaryotes, genes are shuffled at eukaryotic meiosis and prokaryote genomes change by mutation. All these mechanisms bring about phenotypic change. Change is inevitable with the, not 100% faithful replicators, nucleic acids enclosed within the outer membranes of organisms. Change can be selected by Natural Selection. Not all phenotypes are suited to environments and those nonsuited are eliminated by Natural Selection and this further modifies gene frequencies in populations (in eukaryotes), giving more continuous scope for evolution. Evolution is traced via comparative genetics and genomics, comparative anatomy, comparative biochemistry and the fossil record. According to the Theory of Evolution, life started in the oceans. Bacteria like cells first appeared and eventually branched into myriads of other forms, prokaryotic and eukaryotic. Photosynthesis evolved and multicellularity evolved. Protists radiated, as did plants and animals. Plants took over the land as simple mosses and liverworts that were gametophyte-dominant. Gradually the gametophyte was reduced to a few cells in pollen grains of angiosperms and the sporophyte generation evolved fully dominant instead. Animals evolved from simple nerve-less and heartless organisms as sponges, eventually giving rise to both radiate and bilateral animals and among the latter, diploblastic and triploblastic lineages. On-substrate movement brought about cephalisation and as a result directionality was procured. From wormlike creatures with notochords (the larvae of urochordates), evolved fish and from lungfish and coelocanths evolved amphibians and from amphibians evolved reptiles and from reptiles evolved mammals and dinosaurs and from dinosaurs evolved birds. Among mammals, humans evolved from apes. It is incorrect to say that humans evolved from chimpanzees. Humans and chimpanzees evolved not FROM one another but WITH one another. Both arose from a common ancestor, a Pan-Homo common ancestor.
What is an angiosperm?
APEX - A plant that produces seeds w/ protective covers
How have the sporophyte and gametophyte changed as plants have evolved?
The gametophyte has become smaller, and the sporophyte has become larger. To begin with main plant body was gametophytic and sporophyte was dependent on it. Later on, as the evolution progressed, both gametophyte and sporophyte became independent and ultimatly gametophyte became dependent on sporophyte.
Which generation of mosses are the photosynthetic?
The first generation of mosses starts with germination of spores to develop into gametophyte. The male and female gametophytes produce anthridia and archegonia. Motile antherozoids are released from anthridia and make their way to archegonia through water. The egg inside archegonium is fertilized to form the zygote. The zygote develops into a sporophyte, which remain dependent on the gametophyte.
How are club mosses and ferns similar?
Club mosses (Phylum Lycopodophyta) and horsetails (Phylum Equisetophyta) are similar to ferns (Phylum Pteridophyta) in that they; - do not produce seeds, only spores - have stems that are unstrengthened by wood (evolved first in the more advanced gymnosperms) - have a dominant sporophyte generation - do have vascular tissue (not as advanced as seed plants but there nonetheless) - do not produce flowers (flowers evolved first in angiosperms)
What process allows some protists to increase their genetic variability?
1. Asexual reproduction is based on mitosis in eurkaryotic organisms on fission in bacteria and archaea. It results in offspring that are genetically identical to the parent.2. Sexual reproduction is based on meiosis and fusion of gametes. It results in offspring that are genetically different from their parents from each other.3. Sexual reproduction evolved in protists and this evolution ranks among the most significant evolutionary innovations observed in eurkaryotes.4. Alternation of generations: alternation of multicellular haploid (gametophyte) and diploid (sporophyte) forms. When alternation of generations occurs, a spore divides by mitosis to form a haploid, multicellular gametophyte. The haploid gametes produced by the gametophyte then fuse to form a diploid zygote, which grows into the diploid, multicellular sporophyte.
What group of plants was becoming dominant as humans evolved?
Okay first of all, humans did NOT evolve from monkeys or anything like that. So there were NO plants that became dominant as humans evolved. Evolving is for dummies!! :0)
Which group of plant evolved during the Mesozoic Era is dominant plant?
Precambrian
Who is the evolved form of Farfetch'd in Pokemon?
Farfetch'd does not evolve as of the current generation.
What are major characters of Bryophytes?
Bryophytes are non-vascular i.e. They don't have Xylem and Phloem in them. They are amphibious plants because they need water for reproduction. In most cases there is cuticle over epidermis to prevent water loss. They are considered to be evolved from Green Algae. They live in moist and shady habitats. There is a heteromorphic alternation of generation in the life cycle of bryophytes and the Gametophytic haploid generation is dominant and photosynthetic and Sporophytes are recessive and depend on Gametophyte for their nutrition. The body shape of these plants is either thalloid (lacks differentiation) or is differentiated into a false root, shoot and Rhizome; which is a false, root like structure used to anchor plant in soil.
Which type of fish evolved during the Devonian?
Fish and molluscs were the dominant creatures during the Devonian.
What season was the Pokemon marrill in?
Marill is from Generation II, as is its evolved form, Azumarill. Its pre-evolution Azurill, however, is from Generation III.
What iscomputer generation?
The computer generation is the term given to people born from 1988 to the present day. This is because they were born when computers and technology rapidly evolved.
What is evolution mean?
Evolution can be just a noun derived from the verb 'to evolve'. It means to develop, to change... There is an evolution of everything in this sense; evolution of language, evolution of one's knowledge of a book's characters as one progresses through a book, evolution of a garden as one plants more things, evolution of this answer as I progress through writing it, evolution of the sort of questions asked on WikiAnswers... However, the questioner most probably desires an explanation of biological evolution. This is known as the Theory of Evolution and Darwinism. It was made famous by its hypothesiser Charles Darwin. Since its hypothesis state it is now the greatest underlying theory of biology. It explains, along with its mechanism of Natural Selection, how organisms change over time. Gene frequencies change in populations of eukaryotes, genes are shuffled at eukaryotic meiosis and prokaryote genomes change by mutation. All these mechanisms bring about phenotypic change. Change is inevitable with the, not 100% faithful replicators, nucleic acids enclosed within the outer membranes of organisms. Change can be selected by Natural Selection. Not all phenotypes are suited to environments and those nonsuited are eliminated by Natural Selection and this further modifies gene frequencies in populations (in eukaryotes), giving more continuous scope for evolution. Evolution is traced via comparative genetics and genomics, comparative anatomy, comparative biochemistry and the fossil record. According to the Theory of Evolution, life started in the oceans. Bacteria like cells first appeared and eventually branched into myriads of other forms, prokaryotic and eukaryotic. Photosynthesis evolved and multicellularity evolved. Protists radiated, as did plants and animals. Plants took over the land as simple mosses and liverworts that were gametophyte-dominant. Gradually the gametophyte was reduced to a few cells in pollen grains of angiosperms and the sporophyte generation evolved fully dominant instead. Animals evolved from simple nerve-less and heartless organisms as sponges, eventually giving rise to both radiate and bilateral animals and among the latter, diploblastic and triploblastic lineages. On-substrate movement brought about cephalisation and as a result directionality was procured. From wormlike creatures with notochords (the larvae of urochordates), evolved fish and from lungfish and coelocanths evolved amphibians and from amphibians evolved reptiles and from reptiles evolved mammals and dinosaurs and from dinosaurs evolved birds. Among mammals, humans evolved from apes. It is incorrect to say that humans evolved from chimpanzees. Humans and chimpanzees evolved not FROM one another but WITH one another. Both arose from a common ancestor, a Pan-Homo common ancestor.
