4. diploid gametophyte produces haploid spores by meiosis. Write about Reproduction in Chlorophyceae. Answer: Question 3. A wide range of thallus organization is found in Algae d. Bryopteris At the time of fertilization (i) Fossil bryophyte Lepidodendron, Williamson 268600, Question 3. Bryophytes | Smithsonian Tropical Research Institute Green dye is derived from it. 1 Answer Saliha Nov 30, 2017 Bryophytes need water for sexual reproduction because the flagillated sperm swim to the non-motile egg in order to fertilize it. Answer: Question 11. Explain the water to land transition in plants with respect to challenges overcome related to water requirements for fertilization to occur and vascular tissue. Bryophytes have neither pollen nor flowers and rely on water to carry the male gametes (the sperm) to the female gametes (the eggs). What is internal and external fertilization? Mostly terrestrial plants so water is not essential for reproduction The first thing bryophytes need to reproduce is water. The antherozoids have flagella swim in a thin film of water to reach the archegonium. This cookie is set by GDPR Cookie Consent plugin. Three Classes of Bryophytes, According to Proskauer: Question 10. b (I) False (II) True (III) False (IV) False, Question 5. How much do a dime bag of cocaine weight? Bryophytes need water for sexual reproduction because the flagillated sperm swim to the non-motile egg in order to fertilize it. What is the importance of angiosperms to humans? Answer: Press ESC to cancel. Answer: Question 9. The spore capsules are produced after the sperm have fertilized the eggs. Question 2. In order to swim, they need, They contain tissue that transports water and other substances throughout the, The gametophyte stage is the dominant part of a, Angiosperms are important to humans in many ways, but the most significant role of angiosperms is as food. Answer: Do you agree with the statement bryophytes need water for fertilization If yes explain? 4 Do you agree with the statement that bryophytes need water for fertilization justify your answer? This website uses cookies to improve your experience while you navigate through the website. Differentiate Haplontic and Diplontic life cycle. *bryophytes living in habitats where roots do not have an advantage. a. Marchanlia Justify your answer. (c) Assertion is true, but Reason is wrong. Answer: (d) C-D-B-A, Question 4. (a) Assertion and Reason are correct. (iv) Ephedra gerardiana Slide mounting medium(D) c. Scalariform conjugation in zygoma. No need of water for fertilization in - doubtnut Correct option is D) Water is essential for fertilization is Cryptogams - Thallophytes, Bryophytes and Pteridophytes. Bryophytes though grow on soil but need water for sexual reproduction. (a) Blue-green algae. For their photosynthetic activity, they utilize the carbon dioxide from sewage and release oxygen. As the aquatic algae doesnt contain any specialized tissue cells all the cells can absorb the water and nutrients where as in the mosses specialised tissue is present to absorb the water and nutrients. . In siphonostele, the xylem is surrounded by phloem with pith in the centre- eg. The reason explaining Assertion. for fertilization. Identify and label the given diagram. a. Riella (d) Assertion is true, but Reason is not explaining Assertion. As a non-vascular plant, the body of moss has no roots; rather, it uses tiny threads to anchor itself to the stones, trees, or ground where it grows. Pteridophytes are the first to acquire vascular tissues, xylem and phloem, and a well-developed root system. The sperms of bryophytes are flagellated and eggs are non-motile. 4 Do pteridophytes depend on water to reproduce? These cookies track visitors across websites and collect information to provide customized ads. b. Epiphytic Algae Rhodymenia c. The gametophyte of Anthoceos (c) haploid, Question 2. Best answer. How does Fielding Portray the relationship between city and country in tom Jones? Differentiate between Sorus, Sporangia, Sporophyll. Where is the tallest General Electric Building located? c. Cone The leaves are dimorphic, foliage and scale leaves are present Bryophytes grow primarily in damp environments but can be found growing in diverse habitats ranging from deserts, the artic, and high elevations. Why do bryophytes need to stay close to the ground? Araucaria (monkeys puzzle), Picea and Phyllocladus, Bark yield tannins and is used in leather industries, For the treatment of asthma, bronchititis, Used to make soap, varnishes, and printing ink, Used to make doors, boats, and railway sleepers, 12. Plectostele: Xylem plates alternates with phloem plates. Sperm produced by a male gametophyte must swim through a layer of rainwater or dew to reach an egg produced by a female gametophyte. Find out the aquatic bryophytes of the following. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. c. 42, Question 4. (iv) Thin walled motile spores Aplanospore (D) d. (I) True (II) False (III) False (IV) True, Question 4. Q: Do bryophytes need water for fertilization? - CK-12 Foundation In this regard, in which plant type is water not required for fertilization? These cookies will be stored in your browser only with your consent. c. Oedogonium, Question 3. Answer: Correct option is C) Gymnosperms does not require water for fertilisation. d. It is an ornamental foliage plant Note: In plants, fertilization occurs when haploid gametes (male and female gamete) by certain agents meet to create a diploid zygote. The fertilized egg (zygote) grows out of the gametophyte, which is also the source of its nourishment. (c) Cyanophyccae Nitrates, brown dye, tanning materials are derived from the peat used in horticulture as packing material. 14 c. 42 d. 28 Answer: Why do bryophytes need water for fertilization? Question 4. (c) Ulothrix The fern "life cycle" refers to sexual reproduction. Sea shell (c) Aplanospores, Question 10. The sporophyte that develops from a fertilized egg has two sets of chromosomes in each cell and so is also diploid. More than half of the total productivity of the world is done by Marine Algae -Justify. Answer: However, they still wait until a rainy period to reproduce, because they need water to carry sperm to the eggs. (2) cup-shaped chloroplast. (iii) Zeamays Actinostele (C) Do you agree with the statement that bryophytes need water for fertilization justify your answer? What is the relationship between Commerce and economics? (iv) Cambium occur in gymnosperm as in dicots So, in order to accomplish fertilization sperm must be provided with water. Answer: Question 1. Answer: Postelia palmaeformis is commonly known as Answer: 7 b. Algae is aquatic whereas bryophtes and ferns grow in damp places. haplodiplontic (b) stipes d. Sargassum, Question 5. The 3 types of life cycles seen in the plant: Question 4. 2003-2023 Chegg Inc. All rights reserved. Answer: a. Prothallus b. Thallus c. Cone d. Rhizophore Answer: a. Prothallus Question 3. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. (c) Assertion is true, but Reason is wrong. water plays a vital role in fertilization since water film is needed for the transfer of spermatium (male sex cell) to the egg cell. answered Aug 29, 2020 by Raju03 (53.6k points) selected Aug 29, 2020 by Kasis02 . Since bryophytes do not depend on root structures . However, you may visit "Cookie Settings" to provide a controlled consent. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. They need water for the male gametes to reach Archegonia to effect fertilization. Choose the correct statement regarding Gymnosperm Answer: Question 6. 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(iii) Branches of limited growth and branches of unlimited growth are seen in gymnosperm Answer: male gametes are dispersed by wind. Create your account View this answer Sexual reproduction is the type of reproduction that occurs in ferns. c. Alnus a. Bryophytes though grow to tile nevertheless need irrigate for sexual reproduction. (iii) Fossil pteridophyte Naiadita, Hepaticites The pollen tube grows towards the archegonium of the female gametophyte. Answer: (i) Prothallus develop into a sporophyte Does angiosperms require water for fertilization? - TechTricks After fertilization, the zygote divides to form an embryo. In spermatophytes, pollination occurs by other agents such as wind and water is not essential for the process of fertilization. b. Angiosperm & Gymnosperm, Question 15. b. In Chara, thallus is encrusted with . You also have the option to opt-out of these cookies. water is necessary for fertilization in mosses where as in vascular plants water is not necessary for fertilization. How co2 is dissolve in cold drink and why? Without water male gamete cannot be transfer towards the female gamete so we can say that it is true, Bryophytes need water for fertilisation. Answer: It is used in water filters as an insultation material. 2. (d) fronds Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. Fern Reproduction and Life Cycle - ThoughtCo Question 3. Answer: Question 8. Pollination is not entomophilous in Recessive represented by single to few celled stage Zygote develop in to dominant sporophyte e.g.Fucus, Gymnosperm, Angiosperm. Bryophytes must live in moist areas because they lack vascular tissue. Question 3. The sperms of bryophytes are flagellated and eggs what non-motile. Gametophytic phase is . Answer: Do Fern sperm need to swim in water to egg? The gametophyte is dependent on water for fertilization but sporophyte can undergo apogamy in dry conditions. Plant body is a sporophyte and it is also the dominant phase. Question: Like bryophytes, ferns require water for fertilization. c. Carpogonium, Question 14. Answer: (i) Embryo ofblyophyta Why is it important for water to be present for the fertilization of mosses and ferns? IV. Answer: Sexual reproduction involves the mixing of the genes of two parents, with the potential to produce new plants that differ, genetically, from each parent. Like bryophytes, ferns require water for fertilization. Why? Explain . 14 We reviewed their content and use your feedback to keep the quality high. Keeping this in view, is water required for fertilization? Reproduction & dispersal - bryophyte - ANBG Since they usually live in places that are moist at least some of the time, this isnt really a problem for bryophytes. The haploid number of chromosome for an Angiosperm is 14, the number of chromosome in its endosperm would be a. haploid gametophyte produces diploid spores by fertilization. (c) Aplanospores Diatomaceous earth is got from the siliceous frustules (Diatom). It includes ectophloic, siphonoslele, Amphiphloic-siphonoslele, soleonslete, eustele, Atactostele, and polycyclic stele thus altogether 6 types. Answer: The sperms the bryophytes are flagellated and testicle represent non-motile. Answer: What is the first step in the fertilization process of plants? b. Mangifera Why do bryophytes require water in their life cycle? 3. The cookie is used to store the user consent for the cookies in the category "Analytics". Look at the picture and find out the correct answer. (b) tetraploid b. a. Prothallus, Question 3. Amphibians are those organisms which live both on land and in water. Answer: Answer: Question 16. This cookie is set by GDPR Cookie Consent plugin. 286600 (b) Assertion and Reason are correct, but Reason is not explaining Assertion. d. They are the simplest land inhabiting cryptogams lacking vascular tissues. (i) Fungi play important role in soil conservation a. Chara (a) calcium carbonate Do they have to give members warning before they bar you? Answer: This cookie is set by GDPR Cookie Consent plugin. Answer: Angiosperms Do Not Need Water For Fertilization. Why It is opposite to Manoxylic condition which is seen in Cycas. Give an account of Rhodophyceae (red algae) criteria. c. (I) True (II) True (III) False (IV) True, Question 2. - Studybuff.com How do bryophytes reproduce? a. Gracilaria Why? a. Marsilea Discoid ((Chara), Girdle shaped (Ulothrix), reticulate (Oedogonium), spiral (Spirogyra), stellate (Zygnema) and plate like (Mougeoutia). Do bryophytes need water for fertilization? - Answers We reviewed their content and use your feedback to keep the quality high. Water is required for fertilization of seedless vascular plants; most favor a moist environment. The plant body has fronds, stipe & holdfast, Question 7. Thus without water the life cycle of a bryophyte cannot be completed. 25.4D: Ferns and Other Seedless Vascular Plants Answer: Question 2. Bryophytes are called amphibians of plant kingdom because they need water for completing their life cycle. In apogamy, a sporophyte grows into a gametophyte without fertilization occurring. How do flowers contribute to the reproductive success of angiosperms? So known as vascular cryptogam. Why do bryophytes still need to live near water? . Answer: So that sperm can whip its flagella in water and swim to egg to fertilize it. Pollen allows angiosperms and gymnosperms to reproduce away from water, unlike mosses and ferns which require water for sperm to swim to the female gametophyte. 1. What happens to petals after fertilization? Answer: Question 11. a. Hibiscus *the sporophyte generation being dependent on the gametophyte generation. Stele includes (a) tubers We also use third-party cookies that help us analyze and understand how you use this website. d. 28 Question 1. B. angiosperms.