The nannandrium or dwarf male can be a few cells long. (e) Change in the environmental conditions. This lichen is pioneer in xerosere Answer. 4 Chlorella. Chara. The female or oogonia bearing plants are normal. Articles Filaments are made up of uninucleate, cylindrical cells. Reindeer moss is a lichen known as (a) Usnea (b) Rocella (c) Cladonia (d) Parmelia. At receptive spot a pore is formed by gelatinization of wall in proliferous species and a transverse slit is formed in operculate species. Answer: (c) 9. They may be formed either singly or by the division of ⦠Name the types of nitrogenous bases present in the RNA. All cells of the filament in between apical cell and the basal cell are intercalary cells. | The flagella are sometimes longer than the body of spermatozoid e.g., in O. crassum and O. kurzii. 9 A). | 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 â Illustrated Formulae & Key Theory Concepts; Q1. (ii) Since the wall does not elongate in the usual manner, the cytoplasmic wall material gathers in the form of a âringâ round the inner wall at the upper end of the cell (Fig. Answer: (c) 10. Occurrence of Oedogonium: Oedogonium (Gr. These Algae Quiz Questions with Answers are important for competitive exams ⦠(b) Usnea ***Best viewed in Google Chrome and Mozilla firefox***, 1. In some species e.g., O. ciliata, the apical cell is tapering and gives rise to narrow hair like structure. Explain the factors which cause dormancy. Algae MCQ Question with Answer Algae MCQ with detailed explanation for interview, entrance and competitive exams. The dwarf males are formed by androspores which are produced in androsporangia. Alga that yields alginic acid is (a) Gelidium (b) Laminaria (c) Volvox (d) Ulva. 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. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? Here, you will discover the NEET Biology MCQ Questions for all Concepts as per the latest syllabus. Multiple Choice Solved Objective practice questions (Practice_Test 51 of 104) for Competitive Exams for botany subject as per the revised syllabus for year 2020. The oosphere is non-motile, green due to chlorophyll and has a central nucleus. The zoospore is dark green in colour except at the hyaline pointed apical end. MCQ ON ALGAE: Dr. S.S Sharma: 2020-09-16: B.Sc(H) PART- I Botany and Bio-Tech- Part I: 6: MCQ ON FUNGI: Dr. S.S Sharma: 2020-09-15: B.Sc(H) PART- I Botany and Bio-Tech- Part I: 7: BATRACHOSPERMUM REPRODUCTION. 3 A). In cell elongation the cell elongates gradually and uniformally. The period of rest for oospore may be a year or more. TOS4. (v) Along with the completion of elongation, a transverse wall formation between the two is also completed. The cell divisions are generally intercalary and sometimes terminal. Such a type of flagellation is known as stephanokont. The upper larger cell forms oogonium and the lower smaller cell function as supporting cell or suffultory cell. (vii) Reproductive structures like zoospores, androspores and male gametes possess a ring of numerous flagella around the anterior end. MCQs ON PLANT KINGDOM. Welcome to BiologyDiscussion! MCQ on Lichens. Sexual reproduction involving the fusion of two cells in Chlamydomonas is (a) isogamy ... passive female gamete, Oedogonium, Chlamydomonas coccifera. The zoospore is uninucleate and contains a ring shaped chloroplast. It is also found attached on other algae such as Cladophora. In some species the oogonial mother cells directly forms the oogonium. 5 C). 5 F). (viii) Asexual reproduction takes place by the formation of multi-flagellate zoospores produced singly per zoosporangium. The intercalary cells of filaments have base-apex polarity and this is maintained even when filaments break and become free floating. Correct Answer : A. ... C Oedogonium . May 16, 2019 / 0 Comments. The protoplast in oogonium metamorphosis’s into a single egg or oosphere. Question 5 of 20. VARIETY OF LIFE February 2, 2019. 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. There is single large nucleus, it is biscuit shaped or biconvex and lies in the centre of cell, internal to the chloroplast. Notes (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. Algae MCQ with detailed explanation for interview, entrance and competitive exams. Fragmentation takes place due to any of the following reasons: (a) Accidental breaking of the filaments. It is common in stagnant water and less common in running water. (vi) Cell division is unique. The two antherozoids are positioned side-by-side or one above the other if divisions are longitudinal and transverse respectively. | A small lens shaped hyaline region is formed between the wall and the nucleus. 3 A). Akinetes are formed in chains of 10 to 40 (Fig. a) Cyanophyta. The terminal cell of the filament called apical cell. In monoecious species the suffultory cell may divide to form antheridia. According to some algologists, nannondrous species are more primitive. Under certain conditions meioaplanospores are formed instead of zoomeiospores (Fig. The filament is made of three types of cells (Fig. The androspore is produced singly within an androsporangium. 12. Reindeer moss is a lichen known as (a) Usnea (b) Rocella (c) Cladonia (d) Parmelia. BIOTECHNOLOGY May 6, ⦠The cell sap contains excretions, secretions and inorganic compounds. Features 4. 5 A, B). NEET UG Biology Reproduction in Organisms MCQs with answers available in Pdf for free download. Chloroplasts are absent or poorly developed in basal cell hence it does not take part in photosynthesis. It is represented by about 400 species. Sample Papers The lower terminal part of basal cells is multi-lobed, disc like or finger shaped which attaches the filament to substratum. Biology Algae Test Online MCQs Biology. The apical cell is green due to chlorophyll and takes part in photosynthesis. Rarely the antheridia are produced singly. The androspore germinates into a dwarf male or nannandrium. Ncert Solutions ... B Oedogonium . | The antheridia are formed on short or dwarf male plants called dwarf males or nannandria (Fig. 2 A, B). What are chemotaxis? Q8: Lichens is a composite of which two organisms? Akinetes are modified vegetative cells which become swollen, round or oval, reddish brown and thick walled. 6. 3 A). 11. The zoomeiospores are liberated in a vesicle (Fig. 4. NEET Biology is the scoring paper in the medical entrance examination. Algae & Bryophytes MCQ Worksheet 4 1. The antherozoids are motile about 30 sub-apical flagella present at the base of beak or hyaline spot (Fig. 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. Here, you will discover the NEET Biology MCQ Questions for all Concepts as per the latest syllabus. These are mostly intercalary but sometimes can be terminal e.g., O. palaiense. Life Cycle. Liberation of androspore is similar to that of a zoospore. (v) Each cell is greater in length than in breadth and contains a well developed reticulate chloroplast enclosing many pyrenoids. The structure and development of oogonium is identical in macrandrous and nannandrous species. The cells are elongated and cylindrical. Then it settles and attaches itself to a solid substratum with its anterior end downwards. Why Studyadda? Answer. View Answer Discuss. The chromatophores have naked pyrenoid like bodies. The centre of the cell is occupied by a large central vacuole which contains the cell sap. 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.