The nucleus comes to lie near this chloroplast. (Fig. NEET Biology is the scoring paper in the medical entrance examination. Lalit Sardana Sir Macrandrous species may be monoecious or dioecious. Free Videos, Contact Us (ii) Since the wall does not elongate in the usual manner, the cytoplasmic wall material gathers in the form of a “ring” round the inner wall at the upper end of the cell (Fig. All cells of the filament in between apical cell and the basal cell are intercalary cells. Questions are in MCQ (Multiple Choice Questions) format. It is common in stagnant water and less common in running water. 8 A-C). 12). | You May Also Like. ALGAE MCQs. ... A Lichens. For eg., Chlamydomonas possess biflagellate zoospores, Ulothrix possess quadriflagellate zoospores and Oedogonium possess multiflagellate zoospores. ... B Oedogonium . The protoplast in oogonium metamorphosis’s into a single egg or oosphere. 1. The growth of Oedogonium filaments takes place by cell division in intercalary cells but sometimes the apical cell also divides and takes part in the elongation of filaments. The cell which functions as zoosporangium gets filled with abundant reserve food and a slight contraction of the protoplast from the cell wall takes place (Fig. The mature egg secretes chemical substance or mucilage to attract antherozoids or the antherozoids may enter oogonium through the slit. Oedogonium done clear. Vegetative reproduction takes place by fragmentation and akinete formation. The mucilage substance is secreted at the base of the zoospore which helps in the liberation of zoospore. Answer: (c) 10. Current Affairs The oospore is liberated by the disintegration of oogonial wall. 80 Questions with Answers and Explanations on “Plant Kingdom” for Botany Students. | The zygote or oospore undergoes meiosis to make four meiozoospores which again form haploid Oedogonium thalli. Multiple Choice Questions on Algae. Agar–agar used in laboratories in which bacterial cultures are grown comes … Sexual reproduction involving the fusion of two cells in Chlamydomonas is (a) isogamy ... passive female gamete, Oedogonium, Chlamydomonas coccifera. Reindeer moss is a lichen known as (a) Usnea (b) Rocella (c) Cladonia (d) Parmelia. The factors influencing sexual reproduction are alkaline medium, deficiency of nutrition, light and dark periods and increased temperature. Algae MCQ with detailed explanation for interview, entrance and competitive exams. The antheridia develop on normal filaments, terminal or intercalary in position. Batrachospermum is (a) Red algae of sea water (b) Brown algae of fresh water (c) Blue algae green algae of fresh water (d) Red algae of fresh water 3. a) Rhodophycophyta b) Xanthophycophyta c) Chrysophycophyta d) Chlorophycophyta 2.The xanthophyte walls are typically of _____________________ a) chitin b) cellulose c) cellulose … According to some algologists, nannondrous species are more primitive. Rarely the antheridia are produced singly. Depending upon the nature of antheridia producing plants, Oedogonium species are of two types: If antheridia are produced on normal size plant, Oedogonium forms are called macrandrous. | (ii) Members prefer to grow in quieter situations and shun flowing waters. Biology Multiple Choice Questions and Answers ... Oedogonium. The contents of an antheridial cells divide either longitudinally or transversely into two. ... C Oedogonium . The receptive spot receives antherozoids for fertilization. 1. 1): (i) The lower-most basal cell or holdfast. Occurrence Class-Chlorophyceae •Oedos-swelling Order-Oedogoniales •Gonos-reproductive bodies Family-Oedogoniaceae •Fresh water filamentous algae Genus-Oedogonium •More than 400 species •Grows in water bodies,ponds,lakes and shallow tanks •Filaments attached to rocks, logs or epiphytic on aquatic plants •On maturity-filaments free floating … 1 Polysiphonia. The sister cell divides repeatedly to form a row of 2-40 antheridia (Fig. (v) Along with the completion of elongation, a transverse wall formation between the two is also completed. D)Lithosere. Part – 1 (Questions 1 – 25) (MCQ 010) 1. The mature zoospore is oval, spherical or pear shaped structure. NEET ... Oedogonium filaments are typically unbranched and only one cell thick. ADVERTISEMENTS: In this article we will discuss about:- 1. Only one male antherozoid is able to fuse with ovum. | a) Cyanophyta. Pascher considered the nanandrous forms as primitive and macrandrous as specialized but a large number of phycologists consider that nannandrous species have been evolved from macrandrous species. Algae & Bryophytes MCQ Worksheet 5 1. 6. The akinetes are formed under unfavorable conditions. It is evident that the outer wall of the newly divided upper cell with the “cap” is derived from the ring except the “cap” which belongs to the old parent wall, whereas, in the lower daughter cell laterals wall are those of the old parent cell. | View Solution play_arrow; question_answer24) The non-motile, greatly thickened asexual spores are called [CPMT 1990] A) Hypnospores done clear. In some species the oogonial mother cells directly forms the oogonium. The genus Oedogonium (Oedos-swollen, gonas-reproductive) structure is the only genus of the family with un-branched filaments. Some species of Oedogonium are terrestrial, found growing on moist soils. Androporangia are more or less similar looking to the antheridia of macrandrous forms and are produced in a similar manner from a mother cell (Fig. What are chemotaxis? (vii) Reproductive structures like zoospores, androspores and male gametes possess a ring of numerous flagella around the anterior end. 3 A). (i) The order oedogoniales includes a single family Oedogoniaceae. | (v) Each cell is greater in length than in breadth and contains a well developed reticulate chloroplast enclosing many pyrenoids. TOS4. Akinetes are modified vegetative cells which become swollen, round or oval, reddish brown and thick walled. Practice more on a regular basis with these NEET Biology objective questions on air pollution and improve your subject knowledge & problem-solving skills along with time management. 5 C). Amazing Facts (iv) Plant body is un-branched (Oedogonium) or branched (Oedocladium, Bulbochaete). 12. Chloroplasts are absent or poorly developed in basal cell hence it does not take part in photosynthesis. (b) Dying or dehydration of intercalary cells. Give a few examples. 1. | The cells are elongated and cylindrical. The nucleus possesses 1-2 nucleoli, and thread like or elongated chromosomes. Multiple Choice Questions form important part of competitive exams and NEET exam and if practiced properly can help … Attempt all the Biology Algae Test Online MCQs for the preparation of all the admissions tests of the Indian universities and colleges, mock quiz and recruitment test. 3 sec, OTP has been sent to your mobile number and is valid for one hour, Who is regarded as the "Father of Indian Phycology'' [BHU 1999], Phycology is the study of [AFMC 1994; Orissa JEE 2005; AMU 2005], Who is popularly known as the "Father of Phycology'', Sexual reproduction and mobile cells are absent in, Agar?Agar is obtained from [CPMT 1993, 96, 98; AFMC 1997; KCET 2000], In the life cycle of which group flagellated cells are not formed, Which one of the following is not a accessory pigment, Fusion of mature individuals which directly act as gametes, is called, A motile flagellated asexual cell is called, Gametes formed by meiosis are called [AFMC 1994, 95], Which one is a parasitic algae [CBSE PMT 2001; BHU 2001, 04; BVP 2002], Algae which form motile colony is [Orissa JEE 2005], Sporophytic generation is represented by zygote only in [CBSE PMT 1992], In biotechnological studies, the alga that is exploited as a rich source of protein is [BHU 1990; AIIMS 2003], More than one pyrenoid are present in [CPMT 1991], The non-motile, greatly thickened asexual spores are called [CPMT 1990], Which one of the following statements concerning the algae is wrong [CPMT 1987], Which among the following do you consider as the best evidence to show that two species of algae are closely related [AFMC 1981], Pyrenoids are the centre of formation of [BHU 1979], Algae are important, we should study algae because [AFMC 1988, 89], The simplest green plants are [DPMT 1981; JIPMER 1983], Thermal algae are forms which grow and survive [NCERT 1983], Rhodophyceae is red coloured due to [BHU 1981], In the Chlorophyta, the reserve food of protein surrounded by starch, form a compact body termed [JIPMER 1993], Algae are in the same major group of plants as are the [CBSE PMT 1993], Alga rich in protein is [CMC Vellore 1993; CBSE PMT 1997; BVP 2001, 04; CPMT 2004], A filament of an alga can be differentiated from that of a fungus by, Red eye spot containing haematochrome is meant for, All cells of sex organs are formed gametes in [RPMT 1995], Pyrenoids are made up of [CBSE PMT 1995; RPMT 1995], Floridean starch is found in [BHU 1995], Pyrenoids are characteristically found in the chloroplast of [MP PMT 1995], The giant algae or sea weeds belong to class [Bihar MDAT 1995], Most important alga in research centres is [CPMT 1996], Amongst plants which one of the following group has been classified on the basis of pigments, Algae differ from Bryophyta in possessing [MP PMT 1998], Red rust of tea is caused by [CPMT 1999; JIPMER 2001; BHU 2003], In which of the following algal classes the starch and oil are present [CPMT 1998], Which of the following pigments is present in all algae [CPMT 1990, 98; J&K CET 2002], Brown algae is characterised by the presence of [CBSE PMT 1997; Haryana PMT 2005], The element present in thyroxin is obtained from [CPMT 2000], Which of the following is obtained from algae [CBSE PMT 2000], Marine algae flourished well during which period [CBSE PMT 2001], Stomata are not found in [MP PMT 2001], Smallest plant which contain green pigment such as higher green plant is [CPMT 2002], Chlamydomonas does not occur in [CPMT 2002], Sexual reproduction in algae results in the formation of [DPMT 2003; BVP 2004], Plants manufacturing their own food are called [DPMT 1977; AFMC 1986], Most primitive members of the plant kingdom are, Meiotic division in zygote takes place in [RPMT 1995], Thallophyta includes [RPMT 1988; CPMT 1994; JIPMER 2000], Sea weeds are important source of [AFMC 2004], The thallus of Volvox is called [Pb. (iv) The next stage is the elongation or stretching of the daughter cells by breaking up of the wall layers round the groove of the ring. The liberated antherozoids or spermatozoids or sperms are pale green or yellow green, oval or pear shaped. The antheridia are produced on special type of small or dwarf plants, known as Dwarf males or Nannandria. Occurrence of Oedogonium 2. Occurrence of Oedogonium: Oedogonium (Gr. 6 A). Asexual reproduction takes place by means of multi-flagellate zoospores produced singly in intercalary cap cell. The sexual reproduction in Oedogonium is of advanced oogamous type. Which part of the male reproductive system store the sperm? How do you appreciate about the organization of cell in the living body? PMT 2004], question_answer66) Batrachospermum is found in [MHCET 2001], question_answer67) In oogamy, fertilization involves [CBSE PMT 2004], question_answer68) Agar agar is obtained from [BVP 2001, 02; AFMC 2004; CPMT 2004], question_answer69) Agranal chloroplast are found in [DPMT 2004], question_answer70) Algae attached to stone is called [Orissa JEE 2004], question_answer71) Pyrenoids in green algal cells are related to [AIEEE 2004], question_answer72) Reserve food material of algae is [BCECE 2005], question_answer73) In chlamydomonas the meiosis occurs in [J&K CET 2005], question_answer74) Which of the following form contain algae [BHU 2005], question_answer75) Alginic acid is obtained from [HP PMT 2005], question_answer76) The pigment phycoerythrin is characteristic of [HP PMT 2005], question_answer77) Which of the following is a flagellated alga [HP PMT 2005], question_answer78) Which of the following is a nitrogen fixer [HP PMT 2005], Copyright © 2007-2020 | The antherozoids swim freely in water before they reach oogonia and take part in fertilization. Before sharing your knowledge on this site, please read the following pages: 1. Several factors control zoospore formation of which high pH and CO2 concentration of medium and a diurnal rhythm of light and darkness are significant. 3 Batrachospermum. The antherozoids are similar to zoospores in structure but these are smaller than zoospores. These are mostly intercalary but sometimes can be terminal e.g., O. palaiense. 5 D). 9 A). O. cardiacum. 11. In monoecious macrandrous species antheridia and oogonia are produced on the same plant e.g., O. fragile, O. hirnii, O. kurzii and O. nodulosum. The antherozoids are motile about 30 sub-apical flagella present at the base of beak or hyaline spot (Fig. The chloroplast is characteristically reticulate, extending or covering the whole cell and encircling the protoplast (Fig. 5 D, E). Fully solved General Knowledge questions on Science for better preparation of Govt Exams, Bank PO and SSC Exams. 6 B). Liberation of androspore is similar to that of a zoospore. The process of cell division in Oedogonium takes place in following stages: (i) The nucleus from periphery moves towards the centre and slightly towards the upper part of the cell (Fig. They may be formed either singly or by the division of … Share this question with your friends. Akinetes are formed in chains of 10 to 40 (Fig. In cell division the protoplasm divides, the first sign of which is the division of nucleus. Answer. The filament is attached by means of specially differentiated basal cell. The morphology of Oedogonium is unique, with an interior and exterior that function very differently from one another and change throughout its life cycle.These protists reside in freshwater … Explain its main characters. (a) Ulothrix, Oedogonium (b) Spirogyra, Zygnema (c) Sargasum, Oscillatoria (d) Both a and b 28. 3 A). The nannandrium or dwarf male can be a few cells long. | Q8: Lichens is a composite of which two organisms? The holdfast is found in aquatic species and it rarely occurs in terrestrial forms. Unicellular Red alga is (a) Batrachospermum (b) Harveyella (c) Porphyridium (d) Chondrus 2. The oospore is red in colour due to accumulation of red oil. | View Answer Discuss. 1. As the ovum matures, the nucleus moves to periphery, the oosphere retracts slightly from the oogonial wall and develops a hyaline or receptive spot just outside the nucleus. The apical cell is green due to chlorophyll and takes part in photosynthesis. The ornamentation of oospore is of taxonomic importance. In gynandrosporous nannandrium forms the androsporangia and oogonia are formed on same filaments (Fig. 4). | Mostly the newly formed cap cell functions as the zoosporangium. At receptive spot a pore is formed by gelatinization of wall in proliferous species and a transverse slit is formed in operculate species. In ... Oedogonium. MCQ Biology - Learning Biology through MCQs. VARIETY OF LIFE February 2, 2019. Reproductive Structure of Oedogonium (With Diagram) | Algae, Cyanophyta: Micro-cystic and Oscillatoria (With Diagrams). A small lens shaped hyaline region is formed between the wall and the nucleus. In lichens, sexual reproduction is carried out by, 8. (d): Isogamy involves the fusion of gametes which are morphologically and physiologically … The initial cell which gives rise to antheridia is called antheridial mother cell. (x) Species are homothallic as well as heterothallic. After swimming about for some time, the androspore settles on oogonial wall e.g., O. ciliatum or on the supporting cell e.g., O. concatenatum. In some species a mucilage drop is extruded through opening to attract antherozoids. The protoplasm consists of thin plasma membrane, cytoplasm, central vacuole, reticulate chloroplast and the nucleus. | 2 A, B). (iii) Oedogonium is terrestrial while Oedocladium and Bulbochaete are aquatic. The zoospores are not formed in chains and one sterile cell is always present between two zoosporangia. A sub apical ring of flagella is present and such flagellation is called stephanokontic type (Fig. This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. The lower hyaline part elongates to make holdfast and the upper part divides repeatedly to make new filament (Fig. 6 C). (viii) Asexual reproduction takes place by the formation of multi-flagellate zoospores produced singly per zoosporangium. Oedogonium filament breaks into many small fragments which have capability to grow into complete filaments under favourable conditions. Test Series Question No : 35 Which is a rich source of protein ? Media The androspores are motile and have a subpolar ring of flagella. The antherozoids swim through the opening of oogonial wall and enter the egg through hyaline receptive spot (Fig. The reproduction in Oedogonium takes place by vegetative, asexual and sexual methods. The oogonium also secretes growth hormones which induce suffultory cell to increase in size (Fig. Ncert Solutions The lower terminal part of basal cells is multi-lobed, disc like or finger shaped which attaches the filament to substratum. Each androsporangium produces a single androspore just as in the case of zoospore. According to Mainx (1931) the zygote may require chilling before germination. The dwarf male filament is produced by the germination of a special type of spore known as androspore. What is a living organism? Feb 10,2021 - Test: Spirogyra | 30 Questions MCQ Test has questions of Class 11 preparation. b) Rhodophyta. MCQs ON PLANT KINGDOM. The strands of reticulum may be broad or narrow depending upon the species. | The antheridial mother cell divides by transverse division to form an upper smaller cell called antheridium and a lower larger cell called sister cell. Answer: (c) 10. OEDOGONIUM. oedos, swelling; gonos, reproductive bodies) is an exclusively fresh water alga. Answer Now and help others. 3. MCQ on Lichens. In some species e.g., O. ciliata, the apical cell is tapering and gives rise to narrow hair like structure. B) Aplanospores done clear. D Scytonema . Cell Structure 5. Sexual reproduction involving fusion of two cells in Chlamydomonas is (a) isogamy ADVERTISEMENTS: (b) homogamy (c) somatogamy (d) hologamy. In which plants motile ciliated spores are produced during spore formation ? (b) Usnea ***Best viewed in Google Chrome and Mozilla firefox***, 1. This test is Rated positive by 87% students preparing for Class 11.This MCQ test is related to Class 11 syllabus, prepared by Class 11 teachers. In Oedogonium the female sex organ oogonia are highly differentiated female gametangia. Oedogonium is a genus of filamentous, free-living green algae, first discovered in the fresh waters of Poland 1860 by W. Hilse and later named by German scientist K. E. Hirn. It is accompanied by the formation of cap of cell wall material. 3. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? Aplanospores- These spores are non-motile. question_answer1) Who is regarded as the "Father of Indian Phycology'' [BHU 1999], question_answer2) Phycology is the study of [AFMC 1994; Orissa JEE 2005; AMU 2005], question_answer3) Who is popularly known as the "Father of Phycology'', question_answer4) The classification of algae is based on, question_answer5) Sexual reproduction and mobile cells are absent in, question_answer6) Botanical name of sea palm is, question_answer7) Agar?Agar is obtained from [CPMT 1993, 96, 98; AFMC 1997; KCET 2000], question_answer8) Iodine is obtained from the members of, question_answer9) Example of coenocytic algae is, question_answer10) In the life cycle of which group flagellated cells are not formed, question_answer12) Which one of the following is not a accessory pigment, question_answer13) In physiological anisogamy, question_answer14) Fusion of mature individuals which directly act as gametes, is called, question_answer15) A motile flagellated asexual cell is called, question_answer16) Gametes formed by meiosis are called [AFMC 1994, 95], question_answer17) Which one is a parasitic algae [CBSE PMT 2001; BHU 2001, 04; BVP 2002], question_answer18) Algal cell wall is composed of, question_answer19) An example of agarophyte is, question_answer20) Algae which form motile colony is [Orissa JEE 2005], question_answer21) Sporophytic generation is represented by zygote only in [CBSE PMT 1992], question_answer22) In biotechnological studies, the alga that is exploited as a rich source of protein is [BHU 1990; AIIMS 2003], question_answer23) More than one pyrenoid are present in [CPMT 1991], question_answer24) The non-motile, greatly thickened asexual spores are called [CPMT 1990], question_answer25) Which one of the following statements concerning the algae is wrong [CPMT 1987], question_answer26) Which among the following do you consider as the best evidence to show that two species of algae are closely related [AFMC 1981], question_answer27) Pyrenoids are the centre of formation of [BHU 1979], question_answer28) Algae are important, we should study algae because [AFMC 1988, 89], question_answer29) The simplest green plants are [DPMT 1981; JIPMER 1983], question_answer30) Thermal algae are forms which grow and survive [NCERT 1983], question_answer31) Rhodophyceae is red coloured due to [BHU 1981], question_answer32) In the Chlorophyta, the reserve food of protein surrounded by starch, form a compact body termed [JIPMER 1993], question_answer33) Algae are in the same major group of plants as are the [CBSE PMT 1993], question_answer34) Alga rich in protein is [CMC Vellore 1993; CBSE PMT 1997; BVP 2001, 04; CPMT 2004], question_answer35) A filament of an alga can be differentiated from that of a fungus by, question_answer36) Red eye spot containing haematochrome is meant for, question_answer38) Palmella stage is produced, question_answer39) All cells of sex organs are formed gametes in [RPMT 1995], question_answer40) Pyrenoids are made up of [CBSE PMT 1995; RPMT 1995], question_answer41) Floridean starch is found in [BHU 1995], question_answer42) Pyrenoids are characteristically found in the chloroplast of [MP PMT 1995], question_answer43) The giant algae or sea weeds belong to class [Bihar MDAT 1995], question_answer44) Most important alga in research centres is [CPMT 1996], question_answer45) Amongst plants which one of the following group has been classified on the basis of pigments, question_answer46) Algae differ from Bryophyta in possessing [MP PMT 1998], question_answer47) Red rust of tea is caused by [CPMT 1999; JIPMER 2001; BHU 2003], question_answer48) In which of the following algal classes the starch and oil are present [CPMT 1998], question_answer49) Which of the following pigments is present in all algae [CPMT 1990, 98; J&K CET 2002], question_answer50) Brown algae is characterised by the presence of [CBSE PMT 1997; Haryana PMT 2005], question_answer51) The element present in thyroxin is obtained from [CPMT 2000], question_answer52) Which of the following is obtained from algae [CBSE PMT 2000], question_answer53) Marine algae flourished well during which period [CBSE PMT 2001], question_answer54) Stomata are not found in [MP PMT 2001], question_answer55) Smallest plant which contain green pigment such as higher green plant is [CPMT 2002], question_answer56) Chlamydomonas does not occur in [CPMT 2002], question_answer57) Sexual reproduction in algae results in the formation of [DPMT 2003; BVP 2004], question_answer58) Plants manufacturing their own food are called [DPMT 1977; AFMC 1986], question_answer59) Sex organs of thallophytes are generally, question_answer61) Most primitive members of the plant kingdom are, question_answer62) Meiotic division in zygote takes place in [RPMT 1995], question_answer63) Thallophyta includes [RPMT 1988; CPMT 1994; JIPMER 2000], question_answer64) Sea weeds are important source of [AFMC 2004], question_answer65) The thallus of Volvox is called [Pb. May 16, 2019 / 0 Comments. (c) Disintegration of intercalary cells due to conversion in sporangia. In many cases cap is present at the top of the apical antheridium. 4 Chlorella. Then it settles and attaches itself to a solid substratum with its anterior end downwards. Privacy Policy3. This hyaline bald spot later forms the anterior end of the zoospore. 2. In most of the cases the strands are parallel to the long axis of the cell. The protoplast occurs as thin layer between the central vacuole and the inner cell wall. Notes After attachment flagella are withdrawn and it starts elongation. View Answer Discuss. Share Your Word File Correct Answer : A. The diploid oospore nucleus undergoes zygotic meiosis to form four haploid nuclei before germination. In macrandrous monoecious species, where antheridia and oogonia develop on the same plant, the Oedogonium species are protogynous i.e., the development of oogonia takes place before development of antheridia to ensure cross-fertilization. Solved Papers The zygote secretes a thick wall around itself and forms oospore. Such cells are called cap cells. Alga that yields alginic acid is (a) Gelidium (b) Laminaria (c) Volvox (d) Ulva. 3 D). “Cap cells” usually divide repeatedly showing as many caps as there have been divisions and the position and number of such cells in a filament is specific characters. In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well: Question Bank in Electronics & Communication Engineering by Prem R Chadha; A Handbook on Electronics Engineering – Illustrated Formulae & Key Theory Concepts; Q1. Many pyrenoids are present at the intersections of the reticulum, Pyrenoids are covered with starch plates. Like antheridia any freely divided or actively growing cap cell functions as the oogonial mother cell. 7 C-G). Share Your PPT File. O. elegans, O. obolongellum and O. tenuis. In cell elongation the cell elongates gradually and uniformally. Disclaimer Copyright, Share Your Knowledge Here, you will discover the NEET Biology MCQ Questions for all Concepts as per the latest syllabus. In monoecious species the suffultory cell may divide to form antheridia. Answer and Explanation: ADVERTISEMENTS: 1. (ii) Since the wall does not elongate in the usual manner, the cytoplasmic wall material gathers in the form of a “ring” round the inner wall at the upper end of the cell (Fig. Study Packages Articles The dwarf males are formed by androspores which are produced in androsporangia. We know that when a cell divides into two daughter cells, two separate processes are involved, one is cell division and the other is cell elongation including the cell walls.
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