This event is a precursor to the seed habit considered an important step in evolution. b. Gametophyte and sporophyte of Funaria. Fusion of male gamete … with the egg present in the archegonium result in the fonnation of zygote. Tech Companion - A Complete pack to prepare for Engineering admissions, MBBS Companion - For NEET preparation and admission process, QnA - Get answers from students and experts, List of Pharmacy Colleges in India accepting GPAT. Because of this specific restricted requirement and the need of water for fertilisation, the spread of living pteridophytes is limited and restricted to narrow geographical regions. These gametophytes require cool, damp, shady places to grow. (C.B.S.E 2010) Q.20 Differentiate between albuminous and non-albuminous seeds, giving one example each. a. Haplontic life cycle (c) Monocots (d) Bryophytes 2) This megaspore mother cell divides by meiosis to produce four haploid megaspores which are arranged in a linear tetrad. Q9. However, in pteridophytes the 2n (diploid) phase is dominant, well organized, independent while the n phase though also free-living and independent is short lived and photosynthetic. Ans: Roots in some genera have fungal association in the form of mycorrhiza (Finns), while in some others (Cvms) small specialised roots called coralloid roots are associated with N2-fixing cyanobacteria. What would happen if sperms are devoid of their tail? Ans: (d) One of the gymnosperms, the giant redwood tree Sequoia is one of the tallest tree species. Roots are the organs used for the purpose of absorption. Draw labelled diagrams of a. Ans: (c) Diploid number (2«) of a flowering plant is 36. Ans: a. Haplo-diplontic—Ectocarpus, Polysiphonia and Kelps b. Diplontic—Fucus. They produce a multicellular body called a sporophyte. Ans: In majority of the pteridophytes all the spores are of similar kinds, such plants are called hom’osporous. Explain with suitable example. The spores germinate to give rise to inconspicuous, small but multicellular, free-living, mostly photosynthetic thalloid gametophytes called prothallus. a. a. of an ovule Chalaza Outer integument Inner integument Micropyle Funiculus Observation (i) Record the features of ovule like number of integuments, nucellus and micropylar and chalazal poles. Q6. 6.8). Some authors consider this association as controlled parasitism or helotism due to the fact that sometimes the fungus sends its haustoria into the algal cells to derive nourishment. Ans: (b) The embryo sac of an Angiosperm is made up of 7 cells and 8 nuclei. It alternates with multicellular, saprophytic/autotrophic, independent but short-lived haploid gametophyte . (b) Draw a diagram of a mature human male gamete. Unlimited Chapter Wise Tests, a. (a) 36 (b) 18 (c) 54 ‘ (d) 72 The male sex organ is called antheridium. (b) 7 cells and 8 nuclei Give an example of plants with Label the following parts: acrosome, nucleus, middle piece and … Plants of this group are diploid and well adapted to extreme conditions. The development of the zygotes into young embryos take place within the female gametophytes. Draw labelled diagrams of (a) Female and male thallus of a liverwort. Unlimited Subject Wise Tests, b. Gametophyte and sporophyte of Funaria. Zygote do not undergo reduction division immediately. 3) One of the megaspores is functional, while the other three degenerate in … Ans: Lichen is usually cited as an example of symbiosis in biology where in a fungal and an algal species live together for mutual benefit. Ans: In lower plants like algae, holdfast is present and in bryophytes, rhizoids are present instead of roots. Q1. Diagram of spirogyra with label. Hello Everyone.How To Draw Longitudinal Section Of Flower || How To Draw Flower Diagram … (a) Rhodophyceae (b) Chlorophyceae (c) 8 nuclei (d) 7 cells and 7 nuclei They grow bearing sporophylls in compact structures called cones. The sperm cells which are foreseen of flagella can reach the female gametophyte by means of a drop of (rain)water. Ans: Male and female gametophytes of pteridophytes are free living while in gymnosperms male and female gametophyte do not have free-living * existence. In this video i have explained hoe to draw a spirogyra for biology. Spores produced from the moss capsule germinate in favorable conditions. Share with your friends. Each strobilus contains a short appendix and a larger and broader microsporophylls that contains two microsporangia. (a) (b) Pollen tube Antipodal Polar nuclei Egg cell Synergid. The group in reference is gymnosperms. • Zygote thereafter produces a multicellular well-differentiated sporophyte which is the dominant phase of the pteridophytes. Following is the labelled diagram of a male gametophyte of an angiosperm. Ans: In Bryophytes male sex organ is called antheridium and female sex organ is called archegonium. It shows rhizoids and is haploid. Each branch is extra axillary i.e., arise below a leaf. b. Gametophyte and sporophyte of Funaria. What are the consequences of failure of ovulation? Do you think heterospory has some evolutionary significance in plant kingdom? Genera like Selaginella, Salvirtia, Marsilea and Azolla which produce two kinds of spores, macro (large) and micro (small) spores are known as heterosporous. This process is called triple fusion. Q8. Ill. Draw a Labelled Diagram of Gametophyte of Moss Gametophyte of moss: . But Selaginella falls short of seed habit due to lack of integument around the megasporangium. Name them. In Bryophytes male and female sex organs are called _______ and __________ No enzyme that degrades sporopollenin is so far known. Q2. The gametophytes (prothallus) bear male and female sex organs ‘ called antheridia and archegonia, respectively. Ans: (d) A plant shows thallus level of organization. Q2. Unlimited Full Mock Tests, Share 0. Such a pattern is known as haplo-diplontic life cycle. (gymnosperms and angiosperms) (a) Angiosperm (b) Free fern In a haplodiplontic life cycle pattern, such as in bryophyta or pteridophyta both the phases of life are multicellular. Protonema: . PLEASE FAST !!!!!!!!!!!!!!!! 21. It is the first gametophytic structure to be formed with the modification of a microspore mother cell into the pollen grain. The megaspores and microspores germinate and give rise to female and male gametophytes, respectively. Female and male thallus of a liverwort. Q5. The dorsal surface of the thallus shows many regular rhomboidal or polygonal areas (Fig. Chapter 7 Structural Organisation in Animals, Chapter 13 Photosynthesis in Higher Plants, Chapter 17 Breathing and Exchange of Gases, Chapter 19 Excretory Products and Their Elimination, Chapter 21 Neural Control and Coordination, Chapter 22 Chemical Coordination and Integration, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10, Reproductive parts of pteridophytes and gymnosperms. The adult gametophyte (gametophore) is differentiated into rhizoids, axis or ‘stem’ and ‘leaves’ (Fig. The chromosome number in its endosperm 3n = 54. (d) Haploid and is found in pteridophytes Transformation of microspore mother cell (2n) into pollen grain (n) is the first gametophytic structure. c. Alternation of generation in Angiosperm. 5. Q7. Explain why sexual reproduction in angiosperms is said to take place through double fertilization and triple fusion. Multiple Choice Questions formation of two types of spores—microspores and megaspores is a characteristic feature in the life cycle of a few members of pteridophytes and all spermatophytes. Moss plant develops from protonema. They grow bearing sporophylls in compact structures called cones. Gametophyte of moss plant is haploid (n). (ii) Draw the diagrams as observed under microscope. Thos is … Q2. The sex organs in bryophytes are multicellular. Ans: In a sexually reproducing plant there is an alternation of generation between a haploid and a diploid phase of plant bodies. b. Diplontic life cycle—AH seed-bearing plants, i.e. Q4. These microspores give rise to pollen grains (the proper male gametophyte) after undergoing mitotic divisions. How to draw spirogyra is the main topic of this video. 7. Copyright © 2021 Pathfinder Publishing Pvt Ltd. To keep connected with us please login with your personal information by phone/email and password. • Protista— unicellular eukaryotes (a) Monocots (b) Dicots An antherozoid fuses with the egg to produce the zygote. Meiosis is the type of cell division that reduces the number of chromosomes in half. Give a labelled diagram of a pistil showing in it the path of male gametophyte from the stigma to the embryo sac. Ans: (c) Cyanobacteria are classified under Kingdom Monera. Q4. In each antheridium numerous male gametes (antherozoids = sperms) are produced, but in each archegonium only one large single egg cell is produced (ovum). The spores, in turn, produce the gametophytes that give rise to the male and female gametes through the procedure of meiosis. Genera like Selaginella, Salvinia, Marsilea and Azolla which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous. Q7. With the Help of a Neat and Labelled Diagram Describe the Development of Female Gametophyte of Angiosperms. (b) A sporophytic free living structure formed in pteridophytes Exercise 5 Embryo sac Fig. In both of these groups of plants the mobile male gametes, antherozoid produced by sex organ antheridium, travel to archegonium (bearing an egg cell) via the medium of water. Female and male thallus of a liverwort. 8) Describe Gemma with labelled diagram. Strategies for enhancement in food production. The megaspores and microspores germinate and give rise to female and male gametophytes, respectively. (b) Draw a labelled diagram of human ovum released after ovulation. Draw a Labelled Diagram of Gametophyte of Moss; Share This Post. Also explain w’hat these terms mean. Home >> Text Solution >> 2011 Set1 >> Draw a diagram of a male gametophyte of an angiosperm. Label any four parts. a. Female and male thallus of a liverwort. Ans. Comment on the life cycle and nature of a fern prothallus. plant kingdom. Ans: In majority of the pteridophytes all the spores are of similar kinds, such plants are called homosporous. Sporopollenin is considered to be the most resistant organic material because it is chemically very stable and it can withstand high temperatures, acidic and alkaline conditions, and enzymes. Ans: a. Haplontic life cycle—Volvox, Spirogyra and some species of Chlamydomonas of ovary. 1) In the nucleus of a developing ovule, one diploid cell develops into a diploid megaspore mother cell. The gametophyte produces gametes by mitosis while the haploid spores are produced by sporophyte following meiosis (reduction division). Similar Questions. 5.1 V.S. b. Female gametophytes of flowering plants develop within the ovule (megaspore) contained within an ovary at the base of the pistil of the flower. Weekend Live Classes, Why 24x7 Doubt Chat Support,. Water is required for transfer of antherozoids—the male gametes released from the antheridia, to the mouth of archegonium. (C.B.S.E 2010) Q.21 Draw a diagram of a male gametophyte of an angiosperm. 20. Make an attempt to compare the various reproductive parts of pteridophytes and gymnosperms with reproductive structures of angiosperms. It may belong to bryophytes. More reasons for it is not possible to send Mangal Jan without the help of computers. Q8. Q2. Draw labelled diagrams ofa Female and male thallus of a liverwort b Gametophyte and sporophyte of Funaria c Alternation of generation in Angiosperm - Biology - Plant Kingdom The heterosporous pteridophytes show certain characteristics, which are precursor to the seed habit in gymnosperms. Which of the following will happen if algal and fungal partners are separated from each other? 11) Mention the xerophytic characters of pinus needle. Question 3. (c) Phaeophyceae (d) All of the above Ans: Selaginella produce two kinds of spores, macro (large) and micro (small) spores. Ans: Mannitol is the reserve food material of brown algae or phaeophyceae. Mannitol is the reserve food material of which group of algae? called prothallus. Well Label Diagram Of Spirogyra And Volvox Brainly In Spirogyra filaments are slippery and float in large masses. Rhizoids arise from the base of the axis. c. Haplo-diplontic life cycle—Bryophyfes and Pteridophytes. b. Diplontic However, in bryophytes, the gametophytes are small, photosynthetic, independent and represent dominant phase. It may belong to Most algal genera show haplontic life style. Q.19 How many haploid cells are present in a mature female gametophyte of a flowering plant. The development of the zygotes into young embryos take place within the female gametophytes. Each area has a pore at […] Following is the labelled diagram of a male gametophyte of an angiosperm. high, upright, slender and branched. (c) Pterdophyte (d) Gymnosperm They are slender, branched, and multicellular and have oblique septa. Draw labelled diagram of a mature male gametophyte of an angiosperm. Each plant or group of plants has some phylogenetic significance in relation to evolution: Cycas, one of the few living members of gymnosperms is called as the ‘relic of past’. Gametophyte is a dominant phase in the life cycle of a bryophyte. The first stage is the protonema stage (juvenile stage) and the second stage is the leafy stage. Cyanobacteria are classified under Ans: a. Ans: (d) Plants of this group are diploid and well adapted to extreme conditions. If the diploid number of a flowering plant is 36, what would be the chromosome number in its endosperm? (C.B.S.E 2010) Q.20 Differentiate between albuminous and non-albuminous seeds, giving one example each. 10) Explain the microsporphyll of cycas. Q3. In the microsporangium microspores are formed after meiosis. Draw a neat labelled diagram … The embryo sac of an Angiosperm is made up of In each anther, lobe contains to Pollen chambers place longitudinal. 9) Write a note on rhizophore. (b) Diploid and is found in liverworts Why is sporollenin considered the Both will die. How To Draw Longitudinal Section Of Flower || How To Draw Flower Diagram || Step By Step - YouTube. c. Alternation of generation in Angiosperm. Female and male thallus of a liverwort. The group in reference is The megaspores and microspores germinate and give rise to female and male gametophytes, respectively. (a) A structure in pteridophytes formed before the thallus develops (a) Haploid and is found in mosses Both will survive and grow normally and independent from each other. Also draw a labelled diagram of embryo sac to explain the phenomena. Q5. The fungal component in return provides shelter and waste products that are consumed by algal species. Self Study Material, Explain. How many male gametophytes this anther can produce? Experiments though have shown that algal component can grow independently when separated from fungal species. 12) What is protonema ? How far does Selaginella one of the few living members of lycopodiales (pteridophytes) fall short of seed habit? Label an (30th January 2021) | SaralStudy. Ans: After entering one of the synergids, the pollen tube release the two male gametes into the cytoplasm of the synergid. The effect of a given sound lasts on a human ear for about 0.1 second.Use this fact along with the knowledge of speed of sound to estimate for getting a clear and a distinct echo? Sol: Male gametophytes are also called pollen grains. 6. The other male gamete fuses with the secondary nucleus to form the primary endosperm nucleus. Spores germinate to form a... Gametophore: … Similar Biology Study. Ans: Bryophytes are also called amphibians of the plant kingdom because these . Q1. (b) Gametophyte and sporophyte of Funaria. Only one megaspore takes part in the formation of embryo sac; therefore it is called monosporic. a. (c) Diploid and is found in pteridophytes Q5. In this article we will discuss about the process of development of male gametophyte in flowering plants with the help of a suitable diagram. Since there are two fusions (syngamy and triple fusion) inside the ovule during fertilization, it is known as double fertilization. Write an article in about 100-120 words each with the help of the outline given below.The Role of Trees Vital for life pure air and scenic beauty control pollution-conserve water check soil erosion - shade in summer-fruit all time.? Q10. 6.9A). The algal component synthesizes the food through photosynthesis which is utilized by the fungal species for its survival. Explain the development of male gametophyte? Holdfast, stipe and frond constitute the plant body in case of The haploid plant body is termed gametophyte while the diploid plant body is called sporophyte. pteridophytes exhibit this pattern. These are autotrophic/holophytic. 10 Draw a diagram of a male gametophyte of an angiosperm Label any four parts from ME DIPLOMA at SANT Lonwowal Institute of engg & Technology This association is, therefore, a typical case of master-slave relationship where fungus (master) has trapped the algal components (slave) for its own survival while giving nothing in return to it. We hope the NCERT Exemplar Class 11 Biology Chapter 3 Plant Kingdom help you. Male gametophyte development can be classified into two stages: Pre-pollination development and post-pollination development. (d) A primitive structure formed after fertilization in pteridophytes Ans: Cycas, one of the few living members of gymnosperms is called as the ‘relic of past’ because it shows many characteristics which are similar to pteridophytes, like, flagellated antherozoids, circinate ptyxis, megasporophyll is leaf like, presence of archegonia, etc. This is that phase of the plant in which the gametes, that is the egg and sperm formed are haploid (n), having only one set of chromosomes in them. plants can live in soil but are dependent on water for sexual reproduction. But same is not true with the fungal component which dies when separated from algal component. (C.B.S.E 2010) Q.21 Draw a diagram of a male gametophyte of an angiosperm. Fusion of two motile gametes which are dissimilar in size is termed as The antherozoids are released into water where they come in contact with archegonium. They produce biflagellate antherozoids or biciliated sperms. Heterospory, i.e. 7) Draw a neat labelled diagram of T/S of Gametophyte of Anthoceros. This event is a precursor to the seed habit considered an important step in evolution. Why are bryophytes called the amphibians of the plant kingdom? Prothallus tepresents the gametophytic phase in pteridophytes. Axis is 1—3 cm. a. Haplo-diplontic Label any four parts . External Structure of Marchantia: The gametophyte of Marchantia is a dichotomously branched, prostrate, dorsiventral thallus (Fig. (c) Alternation of generation in Angiosperm. Draw a labelled diagram of a mature embryo sac. On germination pollen grain develops into male gametophyte which starts even before pollination. De male cone is in fact composed of numerous strobili. The partly or totally dependent sporophyte is physically attached to the gametophyte. Here we have given NCERT Exemplar Class 11 Biology Chapter 3 Plant Kingdom. NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. Two gamete fuse together to produce a zygote which develops into the diploid sporophyte. With the help of a schematic diagram, describe the haplo–diptontic life cycle pattern of a plant group. Lichen is usually cited as an example of‘symbiosis’ in plants where an algal and a fungal species live together for their mutual benefit. The female gametophytes in these plants are retained on the parent sporophytes for variable periods. Answer. The female gametophytes in these plants are retained on the parent sporophytes for variable periods. # NCERT. Find five rational numbers between 3/5 and 4/5? (a) Protista (b) Plantae (c) Monera (d) Algae If you have any query regarding NCERT Exemplar Class 11 Biology Chapter 3 Plant Kingdom, drop a comment below and we will get back to you at the earliest. Food is stored as Floridean starch in Rhodophyceae. (c) A gametophyte free living structure formed in pteridophytes Also draw a labelled diagram of embryo sac to explain the phenomena. It needs water to complete its life cycle because the male gametes are motile. asked Feb 13, 2018 in Class XI Biology by rahul152 (-2,838 points) Draw labelled diagrams of. Its body is divided into two stages. It shows rhizoids and is haploid. b. Gametophyte and sporophyte of Funaria. - 300075 The process of formation and differentiation of microspore from microspore mother cell by reductional division is known as microsporogenesis. What is pollen sac? Each anther is usually made up of two lobes connected by a connective. Q4. All Ans: (a) The predominant stage of the life cycle of a moss is the gametophyte which consists of two stages. Moss protonema resembles to multicellular green algae in structure. Personalized AI Tutor and Adaptive Time Table, Based on your answer how do you justify this association as symbiosis. Q.19 How many haploid cells are present in a mature female gametophyte of a flowering plant. b. Diplontic life cycle Can you establish a phylogenetic relationship of Cycas with any other group of plants that justifies the above statement? Female and male thallus of a liverwort. Female and male thallus of a liverwort. ADVERTISEMENTS: In this article we will discuss about the structure of Marchantia with the help of diagrams. Q6. Answer: Question 4. [Delhi 2014] Ans.The structure or labelled diagram of anatropous ovule Pistil/Gynoecium It is the female unit of flower. (c) In pteridophytes, meiosis or R/D occurs at the time of spore formation. The plant body in higher plants is well differentiated and well developed. 22. It needs water to complete its life cycle because the male gametes are motile. They remain within the sporangia retained on sporophytes, Q9. Q.9. Draw a labelled diagram of a T.S of a dehisced anther. The female sex organ called archegonium is flask-shaped and produces a single egg. Draw labelled diagram of a mature male gametophyte of an angiosperm. Thus, 8-nucleated, 7-celled female gametophyte is formed within the functional megaspore; therefore the development is called endospores. Mentorship from our Experts, (b) Describe the stages in embryo development in a dicot plant. Difference between Endodermis and Pericycle. In which plant will you look for mycorrhiza and corolloid roots? A bilobed, dithecous anther has 100 microspore mother cells per microsporangium. 13.Draw a labelled diagram of a typical anatropous ovule. What is the equivalent of roots in the less developed lower plants? (a) 8 cells . NCERT Exemplar Class 11 Biology Chapter 3 Plant Kingdom are part of NCERT Exemplar Class 11 Biology. Get Personalized Performance Analysis Report,. Collect information about the different storage capacity of pendrive. (a) Draw a schematic labelled diagram of a fertilised embryo sac of an angiosperm. A flower may be monocarpellary (having one pistil) or multicarpellary (having more than one pistils). T he fertile portion of the stamen is known as an anther. c. Haplo-diplontic life cycle Draw labelled diagrams for : (a) Angiospermic dicot embryo (b) Longitudinal section of a flower showing growth of pollen tube Sol. Q5. Q1. A plant shows thallus level of organization. (a) Oogamy (b) Isogamy (c) Anisogamy (d) Zoogamy Give a labelled diagram of a pistil showing in it the path of male gametophyte from the stigma to the embryo sac. c. Algal component will survive while the fungal component will die. A prothallus is ‘ ‘ Gametophyte (n) The other alternating phase in the life cycle of the plant is the gametophyte generation, in which gametes are formed. Draw labelled diagrams of c. Alternation of generation in Angiosperm . (c) Pteridophytes (d) Gymnosperms Ans: (c) Fusion of two motile gametes which are dissimilar in size is termed as anisogamy. Draw labelled diagrams of the following: (a) Female and male thallus of a liverwort. 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The (n) spores dispersed by sporophyte germinate into individual gametophytic plants. Q4. Ans: (c) The plant body of phaeophyceae is usually attached to the substratum by a holdfast, and has a stalk, the stipe and leaf like photosynthetic organ—the frond. Q1. (c) Alternation of geneation in angiosperm The giant Redwood tree (Sequoia sempervirens) is a/an . (b) Gametophyte and sporophyte of Funaria. List of Hospitality & Tourism Colleges in India, Knockout JEE Main May 2022 (Easy Installments), Knockout JEE Main May 2021 (Easy Installments), Knockout NEET May 2021 (Easy Installments), Knockout NEET May 2022 (Easy Installments), Top Medical Colleges in India accepting NEET Score, MHCET Law ( 5 Year L.L.B) College Predictor, List of Media & Journalism Colleges in India, B. No enzyme that degrades sporopollenin is so far known. NCERT Exemplar ProblemsMathsPhysicsChemistryBiology. Pistils may be syncarpous (fused together) or apocarpous (free). The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral structures of angiosperms. Explain. Q3. Draw a labelled diagram of T.S. Ans: The diploid sporophyte is represented by a dominant, independent, photosynthetic, vascular plant body. OR (a) When and where does spermatogenesis occur in a human male? How arc the male and female gametophytes of pteridophytes and gymnosperms different from each other? Q3. (a) Pteridophytes (b) Gymnosperms CBSE Delhi board paper solution of 12th 2011 Draw a diagram of a male gametophyte of an angiosperm. Name them. Sporopollenin is considered to be the most resistant organic material because it is chemically very stable and it can withstand high temperatures, acidic and alkaline conditions, and enzymes. Answer: (a) Name an alga which is 1 A). Protonema is It produces gametes, hence is called a gametophyte. d. Fungal component will survive while algal partner will die. Ans: The main plant body of the biyophyte is haploid. Q3. Ans: After entering one of the synergids, the pollen tube release the two male gametes into the cytoplasm of the synergid. Angiosperm male gametophytes have two haploid nuclei (the germ nucleus and tube nucleus) contained within the exine of the pollen grain (or microspore). Q5. Egg cell is non-motile hence the reproduction is oogamous. Draw labelled diagrams of. • Plantae, all members of Kingdom Plantae are eukaryotic chloroplast ‘chlorophyll containing organisms commonly called plants. Unlimited Mock Tests and Personalized Analysis Reports,
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