Xii-Biology (Solved)
Total Page：16
File Type：pdf, Size：1020Kb
Load more
Recommended publications
-
The Ferns and Their Relatives (Lycophytes)
N M D R maidenhair fern Adiantum pedatum sensitive fern Onoclea sensibilis N D N N D D Christmas fern Polystichum acrostichoides bracken fern Pteridium aquilinum N D P P rattlesnake fern (top) Botrychium virginianum ebony spleenwort Asplenium platyneuron walking fern Asplenium rhizophyllum bronze grapefern (bottom) B. dissectum v. obliquum N N D D N N N R D D broad beech fern Phegopteris hexagonoptera royal fern Osmunda regalis N D N D common woodsia Woodsia obtusa scouring rush Equisetum hyemale adder’s tongue fern Ophioglossum vulgatum P P P P N D M R spinulose wood fern (left & inset) Dryopteris carthusiana marginal shield fern (right & inset) Dryopteris marginalis narrow-leaved glade fern Diplazium pycnocarpon M R N N D D purple cliff brake Pellaea atropurpurea shining fir moss Huperzia lucidula cinnamon fern Osmunda cinnamomea M R N M D R Appalachian filmy fern Trichomanes boschianum rock polypody Polypodium virginianum T N J D eastern marsh fern Thelypteris palustris silvery glade fern Deparia acrostichoides southern running pine Diphasiastrum digitatum T N J D T T black-footed quillwort Isoëtes melanopoda J Mexican mosquito fern Azolla mexicana J M R N N P P D D northern lady fern Athyrium felix-femina slender lip fern Cheilanthes feei net-veined chain fern Woodwardia areolata meadow spike moss Selaginella apoda water clover Marsilea quadrifolia Polypodiaceae Polypodium virginanum Dryopteris carthusiana he ferns and their relatives (lycophytes) living today give us a is tree shows a current concept of the Dryopteridaceae Dryopteris marginalis is poster made possible by: { Polystichum acrostichoides T evolutionary relationships among Onocleaceae Onoclea sensibilis glimpse of what the earth’s vegetation looked like hundreds of Blechnaceae Woodwardia areolata Illinois fern ( green ) and lycophyte Thelypteridaceae Phegopteris hexagonoptera millions of years ago when they were the dominant plants. -
Mosses and Ferns
Mosses and Ferns • How did they evolve from Protists? Moss and Fern Life Cycles Group 1: Seedless, Nonvascular Plants • Live in moist environments to reproduce • Grow low to ground to retain moisture (nonvascular) • Lack true leaves • Common pioneer species during succession • Gametophyte most common (dominant) • Ex: Mosses, liverworts, hornworts Moss Life Cycle 1)Moss 2) Through water, 3) Diploid sporophyte 4) Sporophyte will gametophytes sperm from the male will grow from zygote create and release grow near the gametophyte will haploid spores ground swim to the female (haploid stage) gametophyte to create a diploid zygote Diploid sporophyte . zygo egg zygo te egg te zygo zygo egg egg te te male male female female female male female male Haploid gametophytes 5) Haploid 6) The process spores land repeats and grow into new . gametophytes . Haploid gametophytesground . sporophyte . zygo egg zygo te egg te zygo zygo egg egg te te male male female female female male female male Haploid gametophytes • Vascular system allows Group 2: Seedless, – Taller growth – Nutrient transportation Vascular Plants • Live in moist environments – swimming sperm • Gametophyte stage – Male gametophyte: makes sperm – Female gametophyte: makes eggs – Sperm swims to fertilize eggs • Sporophyte stage – Spores released into air – Spores land and grow into gametophyte • Ex: Ferns, Club mosses, Horsetails Fern Life Cycle 1) Sporophyte creates and releases haploid spores Adult Sporophyte . ground 2) Haploid spores land in the soil . ground 3) From the haploid spores, gametophyte grows in the soil Let’s zoom in Fern gametophytes are called a prothallus ground 4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia)…zygote created Let’s zoom back out zygo zygo egg egg te te zygo egg te 5) Diploid sporophyte grows from the zygote sporophyte Fern gametophytes are called a prothallus ground 6) Fiddle head uncurls….fronds open up 7) Cycle repeats -- Haploid spores created and released . -
Plant Reproduction
AccessScience from McGraw-Hill Education Page 1 of 10 www.accessscience.com Plant reproduction Contributed by: Scott D. Russell Publication year: 2014 The formation of a new plant that is either an exact copy or recombination of the genetic makeup of its parents. There are three types of plant reproduction considered here: (1) vegetative reproduction, in which a vegetative organ forms a clone of the parent; (2) asexual reproduction, in which reproductive components undergo a nonsexual form of production of offspring without genetic rearrangement, also known as apomixis; and (3) sexual reproduction, in which meiosis (reduction division) leads to formation of male and female gametes that combine through syngamy (union of gametes) to produce offspring. See also: PLANT; PLANT PHYSIOLOGY. Vegetative reproduction Unlike animals, plants may be readily stimulated to produce identical copies of themselves through cloning. In animals, only a few cells, which are regarded as stem cells, are capable of generating cell lineages, organs, or new organisms. In contrast, plants generate or produce stem cells from many plant cells of the root, stem, or leaf that are not part of an obvious generative lineage—a characteristic that has been known as totipotency, or the general ability of a single cell to regenerate a whole new plant. This ability to establish new plants from one or more cells is the foundation of plant biotechnology. In biotechnology, a single cell may be used to regenerate new organisms that may or may not genetically differ from the original organism. If it is identical to the parent, it is a clone; however, if this plant has been altered through molecular biology, it is known as a genetically modified organism (GMO). -
Bazzania Gray (Lepidoziaceae, Marchantiophyta) in Central Java, Indonesia
BIODIVERSITAS ISSN: 1412-033X Volume 19, Number 3, May 2018 E-ISSN: 2085-4722 Pages: 875-887 DOI: 10.13057/biodiv/d190316 Bazzania Gray (Lepidoziaceae, Marchantiophyta) in Central Java, Indonesia LILIH KHOTIMPERWATI1.2,♥, RINA SRI KASIAMDARI2,♥♥, SANTOSA2, BUDI SETIADI DARYONO2 1Department of Biology, Faculty of Sciences and Mathematics, Universitas Diponegoro. Jl. Prof. Soedharto, Tembalang, Semarang 50275, Central Java, Indonesia. Tel./fax.: +62-024-76480923, ♥email: [email protected] 2Department of Tropical Biology, Faculty of Biology, Universitas Gadjah Mada. Jl. Teknika Selatan, Sekip Utara, Sleman 55281, Yogyakarta, Indonesia. Tel./fax.: +62-274-546860, ♥♥email: [email protected] Manuscript received: 20 February 2018. Revision accepted: 21 April 2018. Abstract. Khotimperwati L, Kasiamdari RS, Santosa, Daryono BS. 2018. Bazzania Gray (Lepidoziaceae, Marchantiophyta) in Central Java, Indonesia. Biodiversitas 19: 875-887. Bazzania has the largest species of the family Lepidoziaceae (Marchantiophyta). This genus is abundant in the moist montane forest. Diversity of Bazzania in Java insufficiently reported, especially publications about its diversity in Central Java have never been reported. Therefore this study aimed to explore the diversity of Bazzania in Central Java. Studies of the Bazzania were based on the specimens collected from three mountains in Central Java, i.e. Mt. Lawu, Mt. Ungaran and Mt. Slamet. The observation in the laboratory was done based on the morphological and anatomical feature of the stem, lateral leaf, underleaves (amphigastria) and microphyll. Identification of the species used the existing literature that contains key identification, description or illustration of the Bazzania. Eleven species of Bazzania were identified from Central Java, namely Bazzania calcarata, B. japonica, B. -
Reproductive Morphology
Week 3; Wednesday Announcements: 1st lab quiz TODAY Reproductive Morphology Reproductive morphology - any portion of a plant that is involved with or a direct product of sexual reproduction Example: cones, flowers, fruits, seeds, etc. Basic Plant Life cycle Our view of the importance of gametes in the life cycle is shaped by the animal life cycle in which meiosis (the cell division creating haploid daughter cells with only one set of chromosomes) gives rise directly to sperm and eggs which are one celled and do not live independently. Fertilization (or the fusion of gametes – sperm and egg) occurs inside the animal to recreate the diploid organism (2 sets of chromosomes). Therefore, this life cycle is dominated by the diploid generation. This is NOT necessarily the case among plants! Generalized life cycle -overhead- - alternation of generations – In plants, spores are the result of meiosis. These may grow into a multicellular, independent organism (gametophyte – “gamete-bearer”), which eventually produces sperm and eggs (gametes). These fuse (fertilization) and a zygote is formed which grows into what is known as a sporophyte - “spore-bearer”. (In seed plants, pollination must occur before fertilization! ) This sporophyte produces structures called sporangia in which meiosis occurs and the spores are released. Spores (the product of meiosis) are the first cell of the gametophyte generation. Distinguish Pollination from Fertilization and Spore from Gamete Pollination – the act of transferring pollen from anther or male cone to stigma or female cone; restricted to seed plants. Fertilization – the act of fusion between sperm and egg – must follow pollination in seed plants; fertilization occurs in all sexually reproducing organisms. -
Biol 211 (2) Chapter 31 October 9Th Lecture
S.I. Biol 211 Biology 211 (2) Week 7! Chapter 31! ! VOCABULARY! Practice: http://www.superteachertools.us/speedmatch/speedmatch.php? gamefile=4106#.VhqUYGRVhBc ! Alternation of Angiosperm: A Antheridia: The Archegonia: The generations: A life cycle flowering vascular sperm producing egg-producing involving alternation of a plant that produces structure in most structure in most multicellular haploid seed within mature land plants except land plants except ovaries (fruits). The angiosperms angiosperms stage (gametophyte) with angiosperms form a a multicellular diploid single lineage stage (sporophyte). Occurs in most plants and some protists. Artificial selection: Bisexual Carpel: The female Diploid: Having two Deliberate manipulation gametophyte: One reproductive organ sets of by humans, as in animal gametophyte that in a flower, chromosomes (2n) and plant breeding, of produces both eggs contains the ovary, the genetic composition and sperm which contains of a population by ovules, which allowing only individuals contain the with desirable traits to megasporangia reproduce Double fertilization: An Endosperm: A Fruit: In Gametangia: The unusual form of triploid (3n) tissue angiosperms, a gamete-forming reproduction seen in in the seed of a mature, ripened structure found in flowering plants, in which flowering plant plant ovary, along all land plants one sperm cell fuses with an (angiosperm) that with the seeds it except angiosperms. egg to form a zygote and the serves as food for contains and Contains an other sperm cell fuses with two polar nuclei to form the the plant embryo. adjacent fused antheridium and triploid endosperm Functionally parts, often archegonium. analogous to the functions in seed yolk of an egg dispersal Gametophyte: In Gymnosperm: A Haploid: Having Heterospory: In organisms undergoing vascular plant that one set of seed plants, the alternation of makes seeds but chromosomes production of two generations, the does not produce distinct types of multicellular haploid form flowers. -
Profiling Gene Expression During Early Gametophyte Development and Sex Determination in Ceratopteris Richardii Nadia Atallah Purdue University
Purdue University Purdue e-Pubs Open Access Dissertations Theses and Dissertations Spring 2015 Profiling gene expression during early gametophyte development and sex determination in Ceratopteris richardii Nadia Atallah Purdue University Follow this and additional works at: https://docs.lib.purdue.edu/open_access_dissertations Part of the Bioinformatics Commons, Developmental Biology Commons, and the Plant Sciences Commons Recommended Citation Atallah, Nadia, "Profiling gene expression during early gametophyte development and sex determination in Ceratopteris richardii" (2015). Open Access Dissertations. 417. https://docs.lib.purdue.edu/open_access_dissertations/417 This document has been made available through Purdue e-Pubs, a service of the Purdue University Libraries. Please contact [email protected] for additional information. Graduate School Form 30 Updated 1/15/2015 PURDUE UNIVERSITY GRADUATE SCHOOL Thesis/Dissertation Acceptance This is to certify that the thesis/dissertation prepared By Nadia Atallah Entitled PROFILING GENE EXPRESSION DURING EARLY GAMETOPHYTE DEVELOPMENT AND SEX DETERMINATION IN CERATOPTERIS RICHARDII For the degree of Doctor of Philosophy Is approved by the final examining committee: Jo Ann Banks Olga Vitek Chair Joseph Ogas Milos Tanurdzic Michael Gribskov Peter B. Goldsbrough To the best of my knowledge and as understood by the student in the Thesis/Dissertation Agreement, Publication Delay, and Certification Disclaimer (Graduate School Form 32), this thesis/dissertation adheres to the provisions of Purdue University’s -
Labile Sex Expression in Plants
Biol. Rev. (1998), 73, pp. 157–180 Printed in the United Kingdom # Cambridge Philosophical Society 157 Labile sex expression in plants HELENA KORPELAINEN Department of Biosciences, Division of Genetics, P.O. Box 56, FIN-00014 University of Helsinki, Finland (Received 27 February 1997; revised 12 September 1997; accepted 30 October 1997) ABSTRACT The range of environmental sex determination and sex changes throughout plant taxa from bryophytes and pteridophytes to spermatophytes is reviewed. Lability in sex expression occurs in many plant taxa but only in homosporous pteridophytes is labile sex the rule. Among angiosperms, labile sex appears to be more common among dioecious and monoecious plants than among hermaphrodites. However, hermaphrodites can control allocation to male and female functions by varying the relative emphasis on pollen and ovules. A majority of plants with labile sex expression are perennials, which indicates that flexibility in sex is more important for species with long life cycles. Environmental stress, caused by less-than-optimal light, nutrition, weather or water conditions, often favours maleness. The extreme lability in the sex expression of homosporous pteridophytes is suggested to be related primarily to the mating systems. Key words: labile sex, adaptation, Bryophyta, Pteridophyta, Spermatophyta. CONTENTS I. Introduction ............................................................................................................................... 157 II. Bryophyta.................................................................................................................................. -
Volume 1, Chapter 3-1: Sexuality: Sexual Strategies
Glime, J. M. and Bisang, I. 2017. Sexuality: Sexual Strategies. Chapt. 3-1. In: Glime, J. M. Bryophyte Ecology. Volume 1. 3-1-1 Physiological Ecology. Ebook sponsored by Michigan Technological University and the International Association of Bryologists. Last updated 3 June 2020 and available at <http://digitalcommons.mtu.edu/bryophyte-ecology/>. CHAPTER 3-1 SEXUALITY: SEXUAL STRATEGIES JANICE M. GLIME AND IRENE BISANG TABLE OF CONTENTS Expression of Sex ......................................................................................................................................... 3-1-2 Unisexual and Bisexual Taxa ........................................................................................................................ 3-1-2 Sex Chromosomes ................................................................................................................................. 3-1-6 An unusual Y Chromosome ................................................................................................................... 3-1-7 Gametangial Arrangement ..................................................................................................................... 3-1-8 Origin of Bisexuality in Bryophytes ............................................................................................................ 3-1-11 Monoicy as a Derived/Advanced Character? ........................................................................................ 3-1-11 Multiple Reversals .............................................................................................................................. -
Pteridophytes-Nephrolepis
Characters of Pteridophytes Some of the most important characters of Pteridophytes are as follows: 1. Habit: All Pteridophytes are annual and herbaceous, e.g. Azolla, Selaginella but a few are perennial woody tree fern e.g. Alsophila, Angiopteris. 2. Habitat: They are basically terrestrial plants grow in moist shady cool places. 3. Life Cycle: The life cycle is diplohaplontic which shows heteromorphic type of alternation of generations. 4. The sporophyte is the dominant plant body which differentiated into roots, stem and leaves. i. Roots: Primary root short lived and replaced by adventitious roots. But Psilopsids are rootless plants having rhizoids. ii. Stem: Herbaceous or woody and branched. iii. Leaves: Leaves may be microphyllous (e.g. Lycopodium, Selaginella, and Isoetes) or megaphyllous. (e.g. ferns). The leaves bearing sporangia are called sporophylls. In some cases sporophylls for compact structures called cones or strobili (e.g. Selaginella, Equisetum) 5. Vascular tissues present throughout the sporophyte except in reproductive parts and in gametophyte. Xylem consists of tracheid’s (vessels and fibers absent). Phloem consists of sieve cells only. Stele: 6. Secondary Growth absent except in Isoetes. 7. The sporophyte produces meiosopres inside sporangia. The development of sporangia may be eusporangiate (from a group of cells, e.g. Selaginella, Equisetum, Ophioglossiim etc.) or leptosporangiate (form a single cell, e.g, Azolla, Marsilea, Pterium etc.) 8. The sporophyte may be homosporous (e g. Dryopteris) or heterosporous (e.g. Selaginella, Marsilea, Azolla etc.) In heterosporous forms, 2 types of spores develop i.e. microspores and megaspores. 9. The spore germinates into an inconspicuous, free-living, photosynthetic thalIoid gametophyte called prothallus. -
Embryophyta - Jean Broutin
PHYLOGENETIC TREE OF LIFE – Embryophyta - Jean Broutin EMBRYOPHYTA Jean Broutin UMR 7207, CNRS/MNHN/UPMC, Sorbonne Universités, UPMC, Paris Keywords: Embryophyta, phylogeny, classification, morphology, green plants, land plants, lineages, diversification, life history, Bryophyta, Tracheophyta, Spermatophyta, gymnosperms, angiosperms. Contents 1. Introduction to land plants 2. Embryophytes. Characteristics and diversity 2.1. Human Use of Embryophytes 2.2. Importance of the Embryophytes in the History of Life 2.3. Phylogenetic Emergence of the Embryophytes: The “Streptophytes” Concept 2.4. Evolutionary Origin of the Embryophytes: The Phyletic Lineages within the Embryophytes 2.5. Invasion of Land and Air by the Embryophytes: A Complex Evolutionary Success 2.6. Hypotheses about the First Appearance of Embryophytes, the Fossil Data 3. Bryophytes 3.1. Division Marchantiophyta (liverworts) 3.2. Division Anthocerotophyta (hornworts) 3.3. Division Bryophyta (mosses) 4. Tracheophytes (vascular plants) 4.1. The “Polysporangiophyte Concept” and the Tracheophytes 4.2. Tracheophyta (“true” Vascular Plants) 4.3. Eutracheophyta 4.3.1. Seedless Vascular Plants 4.3.1.1. Rhyniophyta (Extinct Group) 4.3.1.2. Lycophyta 4.3.1.3. Euphyllophyta 4.3.1.4. Monilophyta 4.3.1.5. Eusporangiate Ferns 4.3.1.6. Psilotales 4.3.1.7. Ophioglossales 4.3.1.8. Marattiales 4.3.1.9. Equisetales 4.3.1.10. Leptosporangiate Ferns 4.3.1.11. Polypodiales 4.3.1.12. Cyatheales 4.3.1.13. Salviniales 4.3.1.14. Osmundales 4.3.1.15. Schizaeales, Gleicheniales, Hymenophyllales. 5. Progymnosperm concept: the “emblematic” fossil plant Archaeopteris. 6. Seed plants 6.1. Spermatophyta 6.1.1. Gymnosperms ©Encyclopedia of Life Support Systems (EOLSS) PHYLOGENETIC TREE OF LIFE – Embryophyta - Jean Broutin 6.1.2. -
Some Plant Basics
Some Plant Basics Introduction to plant physiology and reproduction Plant Kingdom Plant Ecology • The forest floor is often blanketed with decaying leaves, twigs, fallen trees, animal scat, moss, and other detritus. The forest floor is where recycling occurs, fungi, insects, bacteria, and earthworms are among the many organisms that break down waste materials and ready them for reuse and recycling throughout the forest system. • The herb layer of the forest is dominated by herbaceous (or soft-stemmed) plants such as grasses, ferns, wildflowers, and other ground cover. Vegetation in the herb layer often gets little light and in forests with thick canopies, shade tolerant species are predominant in the herb layer. • The shrub layer is characterized by woody vegetation that grows relatively close to the ground. Bushes and brambles grown where enough light passes through the canopy to support shrub growth. • The understory of a forest consists of immature trees and small trees that are shorter than the main canopy level of the tree. Understory trees provide shelter for a wide range of animals. When gaps form in the canopy, often times understory trees take advantage of the opening and grow to fill in the canopy. • The canopy is the layer where the crowns of most of the forest's trees meet and form a thick layer. • Emergents are trees whose crowns emerge above the rest of the canopy. Source Plant Kingdom Plant Ecology Plant Kingdom Plant Kingdom Plant Kingdom Plant Kingdom Plant Kingdom Plant Kingdom Plant Kingdom Non-Tracheophytes •Bacteria