body cells. Meiosis results in the formation of either gametes in animals or spores in plants. The cells formed have half the chromosome number of the parent cell. Mitosis is best observed in cells that are growing at a rapid pace‚ such as in the onion root cell tips or at Drosophila giant chromosome. The root tips contain a special growth region called the apical meristem where the
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Specialized Leaf Specimen Modification Function Illustration Tendrils Common Name: Scientific Name: Insect-trapping leaves Common Name: Scientific Name: Spines Common Name: Scientific Name: Storage Leaves Common Name: Scientific Name: Window leaves Common Name: Scientific Name: Floral leaves/ bract Common Name: Scientific Name: Succulent leaves Common Name: Scientific Name: 1. Insect-Trapping Leaves—These plants are always attention grabbers and have
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9.2 Maintaining a Balance Contextual Outline Multicellular organisms have specialized organ systems that are adapted for the uptake and transport of essential nutrients from the environment‚ the utilisation or production of energy and the removal of waste products arising from cellular activities. The basis of healthy body functioning in all organisms is the health of their cells. The physical and chemical factors of the environment surrounding these cells must
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Teeth of humans are small‚ calcified‚ whitish structures found in the mouth that are used to break down food. The roots of teeth are embedded in the maxilla (upper jaw) or the mandible (lower jaw) and are covered by gums. Teeth are made of multiple tissues of varying density and hardness. Teeth are among the most distinctive (and long-lasting) features of mammal species. Humans‚ like other mammals‚ are diphyodont‚ meaning that they develop two sets of teeth. The first set (also called the "baby"
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Microbiology Enzymology and Catalytic Metabolism Hereditary Fructose Intolerance (HFI) Hereditary Fructose Intolerance (HFI) is a genetic condition people are born with‚ usually without previous family history. Individuals with this condition have difficulty metabolizing fructose and/or foods containing fructose. The individuals liver and kidneys attempt to use this sugar for energy and due to the incomplete breakdown of fructose‚ toxic byproducts are produced which eventually leads to serious
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Development) The term phloem originates from the Greek word‚ phloios‚ meaning “bark”. (Merriam-Webster) In vascular plants‚ phloem is the living tissue that carries organic nutrients‚ particularly sucrose‚ to all parts of the plant where needed. (Lalonde S‚ 2004) Phloem’s main job is to move sugars from the source tissue (ex. photosynthetic leaf cells) to sink tissues (ex. non-photosynthetic root cells or developing flowers). Molecules like proteins and mRNAs also are transported to parts of the plant by
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cerebral spinal fluid (CSF) by Ettore Marchiafava and Angelo Celli. It was discovered a few years later in 1887 that Neisseria meningitidis was the cause of Meningococcal meningitis. The bacteria cause inflammation of the meninges‚ several layers of tissue that protect the brain‚ called the dura mater‚ pia mater‚ and arachnoid mater. The dura mater is the thickest‚ outer most layer of the meninges that protects the brain from displacement. The pia mater is the innermost layer of the meninges that is
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Introduction: Mitosis occurs in all eukaryotic cell tissues and produces genetically identical daughter cells with a complete set of chromosomes. In humans‚ mitosis produces somatic cells that are diploid‚ which means they contain two non-identical copies of each of the twenty-three chromosomes. One copy is derived from the person’s mother and the other from the person’s father. Meiosis‚ on the other hand‚ occurs only in testis and ovary tissues‚ producing sperm and ova (eggs). The gametes that are
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Test of Biological Molecules Tamari Manyengavana 5XVGXTJ96 Laboratory Report SCPB111 Principles of Biology Faculty of Applied Sciences Pearson Institute of Higher Education 14 March 2018 Abstract Biological molecules are part of Introduction Biological molecules are formerly known as macromolecules. Macromolecules are large molecules that are formed from smaller molecules called monomers (Ellisman‚ 2014). They are formed by dehydration reactions‚ in which a water molecule is
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only neural inducing factors during development. Targeted mouse deletion in Noggin‚ Chordin‚ or Follistatin genes on their own has only minor effects on neural development. Elimination of Noggin and Chordin produces a headless phenotype but neural tissue still forms‚ meaning deletion of these genes does not completely eliminate neural induction (Bachiller et al‚ 2000). 2) Why was Hensen’s Node used as the RNA source? Hensen’s node is the neural organizer in amniotes which signals the primitive
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