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Microscopic examination
The analysis of minute organisms, cellular organization of any biological structure, and composition of body fluids with the help of a microscope is known as microscopic examination. The magnification of specimens or samples under study helps in attaining a clearer picture of it.
Gram Staining
Named after Hans Christian Gram, a Danish bacteriologist, Gram stain is one of the most powerful staining techniques within microbiology. This technique was introduced in 1882 to identify pneumonia-causing organisms. The Gram staining technique uses crystal violet or methylene blue as primary staining colors to distinguish gram-positive from gram-negative organisms. Under a microscope, the gram-positive organisms appear purple-brown, retaining the primary color. Gram-negative organisms appear pink or red as they do not acquire the color of the primary stain.
(See attached for image...)
Is this an image of a plant root or plant stem? Justify your answer.
Is this specimen from a
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- Answer the following: 1. Does raphanus sativus, Pachyrrisus esosus, Beta vulgaris and Daucus carota are monocot or dicot? 2. What are the root system of the aforementioned plants? 3. Is there any modification of these aforementioned plant? 4. What are the functions of these plants?2. a) As part of an experiment you are required to observe the external features of a fern. State what microscope would you use and give reasons why? b) You have been provided with a plant showing the rooting system and the stem with several leaves. Give SIX features that you will look for to determine whether this is a monocotyledonous plant or a dicotyledonous plant. Present your answer in a clear, logical manner. c) In an experiment students were given the following materials and apparatus: - juices from three local fruits; 4% glucose solution; Benedict's solution; test tubes, beakers, syringes and boiling water bath. Describe CLEARLY the procedure that can be used to estimate the amount of glucose present in each juice. Use numbered steps in your answer.Determine the collective true-false status of the statements using the choices below. I. The vascular bundles of monocot stems are typically distributed all throughout the ground tissue.; II. The vascular bundles inside a typical eudicot stem are arranged in a characteristic ring.; III. Bulbs are stems that branch from the main stem of the plant and grow horizontally on the ground or just under it.; IV. Allium cepa is a plant with a bulb stem. Only two (2) statements are true. Only three (3) statements are true. Only one (1) statement is true. None of the statements is true. All statements are true.
- The primary meristems of monocots are located in a different area of the plant body than those found in eudicots. Where are monocot meristems located and what is it about this arrangement that make them (grasses) more suitable for lawns than eudicots? Edit View Insert Format Tools Table 14pt Paragraph BIUA ev Tov| |o wordsI. Look for representative specimens of herbaceous dicot and monocot stem. The external parts that can be observed are nodes, internodes, leaf scar, lenticel, and buds (axillary and terminal). Examine and compare their external morphology by answering the questions below: 1.. What is the function of the lenticels? Do all stems have lenticels? 2. How can you differentiate a monocot plant from a dicot plant just by looking at the stem? 3. What advantage would herbaceous stems have over woody stems? 4. What advantage would woody stems have over herbaceous stems? II. Compare the internal anatomy of stems of xerophytes, mesophytes, and hydrophytes. Relate differences to the nature/habit of the different plants.Below is a series of pictures of the stem (x.s.) of a corn, Zea mays. 40x (x.s.) 100x (x.s.) Make a sketch of both magnifications (40x and 100x) and upload it here with the following structures labeled: epidermis, sclerenchyma (fibers), ground tissue parenchyma, vascular bundles, phloem, xylem, sieve tube members, companion cells, vessel elements, tracheids
- Below is a series of pictures of a leaf (x.s.) from a eudicot, Syringa vulgaris. 40x (x.s.) Make a sketch of the 40x leaf cross section and upload it here with the following structures labeled: upper epidermis, cuticle, stomata, guard cells, mesophyll (palisade and spongy), veins (xylem and phloem), bundle sheath, collenchyma cells, lower epidermis MacBook ProWhich of the following is NOT a function of the stem in a plant? ANSWER CHOICES ARE IN THE PHOTO. thanks.Cut a transverse section of young stem of a plant from your school garden and observe it under the microscope. How would you ascertain whether it is amonocot stem or a dicot stem? Give reasons.
- Compare monocot, herbaceous dicot and woody dicot stems. Indicate presence or absence of the indicated plant parts or provide a brief description of each. Monocot Herbaceous Dicot Woody Dicot Bases of Comparison Branches (+/-) Nodes Internodes Lenticels (+/-) Leaf scars (+/-) Terminal buds (+/-) Axillary buds (+/-) Color TextureBelow is a series of pictures of the stem (x.s.) of a sunflower, Helianthus sp. Note that it shows both a young stem and older stem. E- young 100x (x.s.) older 100x (x.s.) Make a sketch of both ages and upload it here with the following structures labeled: epidermis, cortex, pith, vascular bundles, fibers, primary xylem, primary phloem, tracheids, vessel elements, collenchyma1) Compare the use of leaf sheath to the petiole of the dicot leaf. 2) What are ligules? Are they found in the dicot plant leaves only? 3) Name some important characteristics of a monocot plant. 4) Are the monocot and dicot plants higher plants? Why?