Why does Fern reproduction require two generations?
The fern life cycle requires two generations of plants to complete itself. This is called alternation of generations. One generation is diploid, meaning it carries two identical sets of chromosomes in each cell or the full genetic complement (like a human cell). A fern’s spores don’t grow into leafy sporophyte.
Do Ferns use photosynthesis?
In the fronds of ferns, photosynthesis rearranges molecules of carbon dioxide and water and produces sugar to use as energy. Ferns move sugar throughout the plant using a set of vessels called the phloem.
Which generation is photosynthetic?
sporophyte generation
What is the significance of alternation of generations?
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 is the difference between isomorphic and heteromorphic alternation of generations?
In an isomorphic alternation of generations (found in some algae, for example) the sporophyte and gametophyte are morphologically similar or identical; in a heteromorphic alternation of generations they are dissimilar (e.g. in mosses the gametophyte is the dominant and conspicuous generation, whereas in higher plants …
Do humans have alternation of generations?
Humans do not have an alternation of generations because there is no multicellular haploid stage. Such organisms exhibit the phenomenon known as alternation of generations.” p.
Which plants use alternation of generations?
Alternation of generations occurs in almost all multicellular red and green algae, both freshwater forms (such as Cladophora) and seaweeds (such as Ulva). In most, the generations are homomorphic (isomorphic) and free-living.
What would happen if animals had alternation of generations?
If animals were to undergo alternation of generations, then imagine that you are the diploid individual (sporophyte). Your mother, the gametophyte, would be haploid, and would look completely different from you (maybe like a SmurfTM). Your grandmother would be diploid, and look like you.
What are the two generations in alternation of generations?
During the life cycle of a plant, the plant alternates between two forms: the sporophyte generation and the gametophyte generation. So, a complete plant life cycle includes both generations.
Which best describes the alternation of generations?
Answer: The correct answer is 3) A gametophyte is a haploid phase. Alternation of generation is a type of sexual life cycle that is found in all plants and some algae. In these organisms, a multicellular gametophyte that is haploid phase alternates with a multicellular sporophyte, which is a diploid phase.
What is alternation of generation with example?
The fern is an example of alternation of generations, in which both a multicellular diploid organism and a multicellular haploid organism occur and give rise to the other. The large, leafy fern is the diploid organism. On the undersurface of its fronds or leaves, its cells undergo meiosis to create haploid cells.