molecules- what do they do? - Membrane receptors- contact and chemical signaling - Cytoplasmic organelles- what does each do? o Mitochondria o Ribosomes o Endoplasmic reticulum (ER)- rough and smooth o Golgi apparatus o Lysosomes o Cytoskeleton- microtubules‚ microfilaments‚ intermediate fibers. o Cellular extensions- flagella‚ cilia‚ microvilli o Nucleus Which mature body cell does not have one? What is the function of the nuclear envelope (membrane)? What is the function of nucleoli?
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Cell: The cell is the basic structural‚ functional and biological unit of all known living organisms. Cells are the smallest unit of life that is classified as a living thing‚ and are often called the "building blocks of life". Discoverer: The cell was discovered by Robert Hooke in 1665. The cell theory‚ first developed in 1839 by Matthias Jakob Schleiden andTheodor Schwann‚ states that all organisms are composed of one or more cells‚ that all cells come from preexisting cells‚ that vital functions
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visualised with fluorescence in situ hybridization techniques. These target cells were shown to be small eukaryotes 3 to 5 μmeters in length (Jones et al 2011). Counter-staining with TAT1 tubulin revealed The target cells capable of forming a microtubule based flagellum (see fig 1)(Jones et al 2011). Chitin was not found in any of the morphs observed‚ this was tested by
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Allison Henry G1 Plants Charophyceans (green algae)- closest relatives of land plant 4 Shared Traits 1. Rose-shaped complexes for cellulose synthesis 2. Peroxisome enzymes 3. Structure of flagellated sperm 4. Formation of phragmoplast a. Group of microtubules that form between daughter nuclei during division of cells Adaptations In charophyceans- layer of sporopollenin prevents exposed zygotes from drying out Allows plants to live further from water Derived Traits of Plants (5) 1. Apical meristems
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functions of mitochondria‚ chloroplasts‚ and peroxisomes. Answer the “big picture” questions: Why do we breathe? How do plants get larger (gain dry mass‚ more specifically)? 2. Describe the functions of the cytoskeleton. Specifically‚ describe microtubules‚ intermediate filaments‚ and microfilaments. 3. Discuss cell wall composition among various organisms. 4. Describe the functions of the extracellular matrix of animal cells. What are collagen‚ fibronectin‚ and integrins‚ and how do they
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Biol GOD Notes. First Edition 1 L. Leong 2012 Chapter 1: Molecules of Life Cell Theory ∝ All living things are composed of cells and the products of cells ∝ Cells are the basic functional unit of life ∝ All cells arise from pre-existing cells Living Things Unicellular: consisting of one cell Multicellular: composed of many cells ∝ All living things: grow and develop‚ regulate metabolic processes‚ move‚ respond to stimuli‚ reproduce AUTOTROPHS: manufacture their own organic carbon compounds
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8.3.1 1. Organisms are made of cells that have similar structural characteristics * Outline the historical development of the cell theory‚ in particular‚ the contributions of Robert Hooke and Robert Brown Date | Name | Event | 1590 | Janssens | World first two lens‚ compound microscope | 1655 | Robert Hooke | First person to use the word ‘cells’Observes these ‘cells’ in cork | 1600’s | Anton van Leeuwanhoek | Improvements in microscopesObserves muscle fibres and bacteria
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Site Plan | I. Neurons/nerve cells A neuron is a cell specialized to conduct electrochemical impulses called nerve impulses or action potentials. Neuron is the main cellular component of the nervous system‚ a specialized type of cell that integrates electrochemical activity of the other neurons that are connected to it and that propagates that integrated activity to other neurons. They are the basic information processing structures in the CNS.
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Meiosis BIOL 1111 Introduction Meiosis is the second important kind of nuclear division. It resembles mitosis in many ways but the consequences of meiotic divisions are very different from those of mitotic divisions. While mitotic division may occur in almost any living cell of an organism‚ meiosis occurs only in special cells. In animals‚ meiosis is restricted to cells that form gametes (eggs and sperm). Each species has a characteristic number of chromosomes per somatic cell. Fruit flies
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Chapter Four DEFINITIONS nucleic acid – polymers specialized for the storage‚ transmission between generations‚ and use of genetic information. There are two types‚ DNA and RNA nucleotides – monomers that compose nucleic acid‚ consist of a pentose sugar‚ a phosphate group‚ and a nitrogen containing base. DNA - – a macromolecule that encodes hereditary information and passes if from generation to generation. RNA and the bonds that stabilize them Purine - one of two chemical forms
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