Introduction to Bryohytes:
In course of evolution, the modification from aquatic habitat to terrestrial habitat happened and only ancient land plants developed. These are called as bryophytes. Though bryophytes colonize terrestrial habitats however they are dependent on water for completion of the life cycle. They create motile male gametes that need the thin film of water for the motility to reach non-motile female gamete to achieve fertilization.
General Characteristics of Bryophytes:
Bryophytes lack roots and don't have vascular system. Few mosses include the primitive system of tubes which perform water and food - conducting tubes are known as leptoids. The single plant is very small, barely a few cm in size. It hardly ever develops large because of lack of supporting tissues. Bryophytes illustrate 2 distinct and well distinct stages of life cycle, sexual and asexual that follows each other. Gametophyte is haploid and develops gametes. Sporophytes are diploid and produces spore. Haploid generation alternates with diploid genetic called as Alternation of generation. Gametophyte may be thalloid or has the axis differential in stem-like and leaf-like structures that have xylem and phloem. Gametophyte is green, photosynthetic and nutritionally independent, and attaches to soil by unicellular or multicellular filaments known as rhizoids. Rhizoids show like roots but they do not have vascular tissues.
Bryophytes are more plentiful in moist tropical areas. They also produce in deserts, mountains. In dry areas, the growth and activity is limited to wet season only.
Morphology of Bryophytes:
Bryophyte is mainly divided in liverworts and mosses.
Liverworts:
Gametophytes generally are close to ground. There are two types of liverworts namely; thalloid liverworts (gametophyte) and dorsi-ventral, with upper and lower surfaces. Leafy liverworts (distinguished in leaf-like and stem-like structures). Leaves of liverworts are with no midribs. Grows on moist ground or rocks which are also wet. (Can be situated in muddy areas. Examples comprise Marchantia and Riccia.
Mosses:
This is largest class of Bryophytes. They are split into 3 subclasses: Sphagnidae (Reat mosses) Andreaide rock mosses) and Bryidae (true mosses). Example comprises funaria.
External Features of Marchantia:
i) Marchantia (Liverwort) Marchantia belongs to family marchantiaceae. Gametophyte bears archegonia on vertical stalked receptacles known as archegoniophore. It develops in cool moist places together with mosses and increases of burnt grounds. It is deep green in color has the important midrib that is marked on dorsal surface by the shallow groove and in ventral surface by the low ridge covered with rhizoids. Marchantia is decorous. Thallus of Marchantia is attached to surface by rhizoids that are of smooth walled. Scales are also present on ventral surface arranged on both side of mid-rib.
External Characteristics of Funaria (Mosses):
i) Funaria is very common moss and extensively distributed throughout world. Adult gametophyte is most conspicuous form of moist plant. It comprises of the main erect axis bearing leaves that are arranged spirally. Adult gametophyte is known as gametophine. It is small and approx 1-3 cm high. Leaves don't have stalk but illustrate the distinct midrib.
ii) The gametophore is joined to substratum by rhizoids. They are multicellular, branched and contain oblique septae. The gametophyte bears sporophyte that includes foot, seta and capsule. Gametophore grows from the filamentous, green short-lived protomenue.
Adaptation of Bryophytes:
i) Bryophytes are set to soil through thread-like, small structures known as Rhizoids. Rhizoids are unicellular and unbranched in liverworts however multicellular and branched in mosses. They join plant to soil and absorb water and minerals from it.
ii) Hydroids transfer water from rhizoids to leaves at apex and food conducting leptoids transport sucrose. In most other bryophytes, exterior capillary system takes care of distribution of water to all parts of plant body.
Tutorsglobe: A way to secure high grade in your curriculum (Online Tutoring)
Expand your confidence, grow study skills and improve your grades.
Since 2009, Tutorsglobe has proactively helped millions of students to get better grades in school, college or university and score well in competitive tests with live, one-on-one online tutoring.
Using an advanced developed tutoring system providing little or no wait time, the students are connected on-demand with a tutor at www.tutorsglobe.com. Students work one-on-one, in real-time with a tutor, communicating and studying using a virtual whiteboard technology. Scientific and mathematical notation, symbols, geometric figures, graphing and freehand drawing can be rendered quickly and easily in the advanced whiteboard.
Free to know our price and packages for online biology tutoring. Chat with us or submit request at [email protected]
Attenuators and Impedance Matching tutorial all along with the key concepts of Attenuator characteristics, Attenuators Specifications, Power transfer, Impedance matching devices, Transformers, Stepped transmission line and Reflection less matching
Theory and lecture notes of Creating Pie Charts all along with the key concepts of Creating Pie Charts, homework help, assignment help, frequency distributions and graphs tutors. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Creating Pie Charts.
Theory and lecture notes of Session management all along with the key concepts of session management, data communication, Device independence, Abstraction. Tutorsglobe offers homework help, assignment help and tutor’s assistance on Session management.
Surface Tension tutorial all along with the key concepts of Molecular Explanation of Surface Tension, Coefficient of Surface Tension, Force of Cohesion and Force of Adhesion, Excess Pressure in Bubbles and Curved Liquid Surfaces, Capillarity
b) If battery eliminator is employed, test its output dc voltage. If output voltage is acquired, a) Clean the battery contacts and test the battery.
tutorsglobe.com special type of inflorescence assignment help-homework help by online inflorescence tutors
tutorsglobe.com biosynthesis of rna assignment help-homework help by online nucleic acid metabolism tutors
fungi tutorial all along with the key concepts of structure of fungi, nutrition and growth of fungi, reproduction in fungi, fungi adaptation and economic significance of fungi
tutorsglobe.com bacterial culture assignment help-homework help by online bacteria-structure tutors
While a company is registered with the Registrar of Companies, it has to be registered either as a public or as a private company.
tutorsglobe.com strain improvement assignment help-homework help by online industrial microbiology tutors
Elastic Constants of Crystals tutorial all along with the key concepts of Experimental determination of elastic constants, Elastic waves in cubic crystals, Elastic isotropy and Cauchy relation
www.tutorsglobe.com offers chemical analysis homework help, chemical analysis assignment help, online tutoring assistance, inorganic chemistry solutions by online qualified tutor's help.
www.tutorsglobe.com offers thermo-chemistry homework help, thermo-chemistry assignment help, online tutoring assistance, physical chemistry solutions by online qualified tutor's help.
Statistics in Biology and Agriculture tutorial all along with the key concepts of Statistics and Biostatistics, Use of statistics in biology, Importance of Sample or Sampling, Sampling Methods and Sampling Distribution
1932377
Questions Asked
3689
Tutors
1446932
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!