Thomas Graham studied the behavior of the diffusion of gases of unequal densities when placed in contact with each other‚ using air as his control. He wanted to numerically prove how the diffusion of the gas volumes was inversely proportional to the value of the density of the gas‚ under constant temperature and pressure. The significance of this experiment was that in led to a reevaluation of the concept of the movement of matter‚ realizing that diffusion dealt with small immeasurable elements of
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Parts of the Flower Name of Flower Part | Description | Anther | Tip of the stamen that produces pollen containing sperm | Filament | Slender stalklike part of the stamer that supports the anther | Ovary | Swollen base of the pistil that contains the ovules | Ovule | eggs that develop into seeds after they are fertilized | Petals | Colorful leaflike parts that attract insects and other animals for pollination | Pistil | Structure that contains the female reproductive organs | Sepals | Leaflike
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process. The data from experimentation provided sufficient results to suggest that the identity of unknown bacterium was the gram-positive spore forming bacteria‚ Bacillus Subtilis. Introduction. One of the main responsibilities of a medical lab is to determine the identity of pathogenic bacteria. It is important to determine the specific type of bacterium causing disease so the physician is able to correctly treat the patients. The structure of bacteria plays a crucial role of what antibiotics
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(the first step in the electron transport chain) (“Succinate Dehydrogenase‚” 2012). Reference Morgan‚ Judith Giles and Carter‚ M. Eloise Brown. Investigating Biology (Laboratory Manual). 7th ed. 107- 121. 2011. Reece‚ Jane B.‚ Urry‚ Lisa A.‚ Cain‚ Michael L.‚ Wasserman‚ Steven A.‚ Minorsky‚ Peter V.‚ and Jackson‚ Robert B. Campbell Biology. 9th ed. 152-171. 2011. Malonate inhibition of oxidation in the Krebs Tricarboxylic acid cycle. (Received for publication‚ October 26‚ 1948)‚ from http://www
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2.7.- COMPARACION ENTRE LAS CELULAS Recuerda que las celulas procarionticas son celulas primitovas que no tienen organelos rodeados por membranas. Su material nuclear se encuentra flotando en el citoplasma. Las bacterias se clasifican como procariontas. Las celulas eucariontas son las mas avanzadas y contienen organelos rodeados por membranas. Su material nuclear esta rodeado por una membrane nuclear. Las celulas de las plantas‚ los hongos y los animals son eucarionticas. Las celulas de las plantas
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Osmosis/Plasmolysis Lab Name: Problem: How do solutions of various salt concentrations influence osmosis in relation to an onion cell? Materials: (per student group): red onion epidermis forceps‚ dropper distilled water NaCl solution paper towels microscope slide cover slip Procedure 1. Make a wet mount of the red onion epidermis. 2. Examine under low power. When you have a clear view of several cells‚ switch to high power. Make a labeled drawing
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The effect of salt concentrations on the mass of the pear cubes ‘Pyrus’ after being soaked in water Aim: The effect of salt concentrations on the mass of the pear ‘Pyrus’ pieces shaped as cubes of 1cm. Background: Osmosis is the net movement of water molecules through a semi-permeable membrane from an area of higher water potential to an area of lower water potential. Water makes up to 70-90% of living cells and cell membranes are partially permeable membranes. Dissolved substances attract
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4000310515center095000420003263900175001760220OSMOSIS IN POTATO CELLS 450000OSMOSIS IN POTATO CELLS 42672007972425Aruna DhungelbIOLOGY 2A OCTOBER-28-14 00Aruna DhungelbIOLOGY 2A OCTOBER-28-14 Osmosis in Potato Cells Aruna Dhungel Biology 2A October 28 2014 Purpose: To see how much osmosis or diffusion will occurs in potato cell based on the concentration of molarity. Procedure: Obtained 3 cups and label A‚ B‚ and C To cup A added 150ml H2O and 8.775gNaCl (stirred cup) Poured
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guard cell swells or shrinks due to the gain or loss of water‚ the thickened wall is the only one to maintain its form. Consequently when the guard cells shrink‚ they shift towards each other‚ closing the stomata. Water enters the guard cells by osmosis. The amount and direction of movement of water is influenced by several factors‚ one of which is light. Light has an indirect effect. The guard cells of stomata through which most water loss comes about by transpiration are sensitive to light
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Name: Leslie Estrada Exercise 1: Cell Transport Mechanisms and Permeability: Activity 1: Simulating Dialysis (Simple Diffusion) Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The driving force for diffusion is You correctly answered: b. the kinetic energy of the molecules in motion. 2. In diffusion‚ molecules move You correctly answered: a. from high concentration to low concentration. 3. Which of the following dialysis membranes has the largest
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