Concept explainers
To determine: The role of plasmodesmata in the movement of nutrients through a plant root.
Introduction: In a multicellular organism, cells are linked to each other by specialized structures called cell junctions. Plant cells are connected to each other by middle lamella and plasmodesmata. Plasmodesmata are defined as passageways or pores between cell walls of adjacent cells that can be opened or closed. When opened, they allow the direct diffusion of ions, water and molecules between the cytosols of adjacent cells. The plasma membrane of one cell is continuous with the plasma membrane of an adjacent cell at these pores. The smooth endoplasmic reticulum from one cell is connected to that of the adjacent cell through a central tubule known as desmotubule.
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Biology
- EXPERIMENT : INITIATION OF CALLUS AND CELL SUSPENSION IN SELECTED PLANTS OBJECTIVES : To prepare plant materials as a source of explants. To initiate callus in solid media and cell suspension from selected plant materials. QUESTIONPlease give a general introduction about this experiment.arrow_forwardExercise II Bryophyta: The Mosses Examine with the dissecting microscope the mosses that are available. The "leafy" plants are the gametophytes and any elongated structures growing above them are the sporophytes. (See text Figure 16-27, page 385.) 15. Label the following in Figure 5 below: spores, zygote, protonema, gametophyte, meiosis, female, male, sporophyte, archegonia, sperm, sporangium. Capsule (n) 9 "Bud" Mature (2n) Female (n) 1n 2n Young sporophyte (2n) gametophyte (n) 82 Antheridia gametophyte (n) Embryo (2n) water E88 Female -gametophyte (n) sperm Fertilization (2n) Figure 5. Moss Life Cycle (drawn by Stephanie Preising, SCSU '20) Obtain a gametophyte and observe its symmetry, its leaf like structures, its axis (pseudo- stem), and is rhizoids. Some species of mosses are unisexual; others are bisexual. The moss gametophyte originates as budlike structures that develop from a protonema (plural: protonemata), a system of branching filaments derived from a germinating spore.arrow_forwardExercise II Bryophyta: The Mosses de Examine with the dissecting microscope the mosses that are available. The "leafy" plants are the gametophytes and any elongated structures growing above them are the sporophytes. (See text Figure 16-27, page 385.) 15. Label the following in Figure 5 below: spores, zygote, protonema, gametophyte, meiosis, female, male, sporophyte, archegonia, sperm, sporangium. € Capsule (n) Mature (2n) Female (n) 1n 2n Young sporophyte (2n) gametophyte (n) Antheridia gametophyte (n) 82 Embryo (2n) water Egg Female, gametophyte (n) sperm Fertilization (2n) Figure 5. Moss Life Cycle (drawn by Stephanie Preising, SCSU '20) Obtain a gametophyte and observe its symmetry, its leaf like structures, its axis (pseudo- stem), and is rhizoids. Some species of mosses are unisexual; others are bisexual. The moss gametophyte originates as budlike structures that develop from a protonema (plural: protonemata), a system of branching filaments derived from a germinating spore.arrow_forward
- Exercise 2: Construct an indented dichotomous key on the following groups of plants: Bryophyta Lower Vasuclar plants Higher Vascular plants Gymnosperms Angiosperms Pteridophyta Equisetophytaarrow_forwardShow all working explaining detailly each step Solution should be typewritten with a computer keyboard!arrow_forwardEXPERIMENT: INITIATION OF CALLUS AND CELL SUSPENSION IN SELECTED PLANTS Please make a general introduction paragraph about this experiment.arrow_forward
- Q6: select the best answer that appliesarrow_forwardPls give answer and explain in detailarrow_forwardDirection: Explain the following in paragraph form consists of at least five sentences Stomates must be open for evaporation to occur. Going back to the last lesson, how plant transport and gas exchange happens?arrow_forward
- Biology (MindTap Course List)BiologyISBN:9781337392938Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. BergPublisher:Cengage Learning