size as indicated by the 3x‚ 10x or 40x‚ etc. marks. If the longest objective of your microscope is marked 97x or 100x or OIO or the word “oil” on it‚ then it has an oil immersion objective (OIO). This objective is used to view bacteria‚ very small protists and fungi. The OIO
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isotonic environment the amount of water diffusing into a cell equals the amount of water diffusing out. The cell remains the same size and is a happy cell. Hypertonic environments are more common than hypotonic ones for members of the bacteria‚ protists‚ fungi‚ and plants. Think about jelly. It sits in your refrigerator week after week without going bad. No mold‚ no bacterial colonies. Just jelly. You can’t do that with practically anything else. The reason
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Domains of Life 3 domains (higher level of classification that groups kingdoms) Bacteria Prokaryotic (single-celled; microscopic) Archaea Prokaryotic (single-celled; microscopic) Eukarya Eukaryotic Includes single-celled eukaryotes Splits the protists into several groups in the kingdom level Includes 3 kingdoms of multicellular eukaryotes Distinguished partly by their modes of nutrition Plantae Plants produce their own sugar and other foods through photosynthesis Fungi Absorbs dissolved
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is as important in human managed ecosystems as well as natural ecosystems (Hambler‚ C.‚ 2004‚ 15). To begin to understand Biodiversity it must be considered on three different levels. Firstly there is species diversity‚ this includes bacteria and protists as well as the species of the multicellular kingdoms. Secondly there is genetic diversity‚ this involves the genetic variation within species among both geographically separate populations and among those individuals within single populations. The
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CHAPTER 12- THE CELL CYCLE I. Concept 12.1- Cell division results in genetically identical daughter cells A. Overview 1) The continuity of life is based on the reproduction of cells or cell division. 2) The cell division process is an integral part of the cell cycle‚ the life of a cell from the time it is first formed from a dividing parent cell until its own division into two cells. B. Cellular Organization of the Genetic Material 1) A cell’s endowment of DNA‚ its genetic
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QUESTIONS 1. According to the Hardy-Weinberg theorem‚ p + q 1 and p2 + 2pq + q2 1. What does each of these formulas mean‚ and how are the formulas derived? p + q 1: If you add all the dominant alleles for a gene to all the recessive alleles for the gene‚ you get all of the alleles for that gene‚ or 100% of the alleles for the gene. (Note: This assumes the gene has only two alleles.) p2 + 2pq + q2 1: If you combine all the individuals that are homozygous dominant for a gene with all
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Yes | Possess both DNA & RNA | Yes | | No | ATP-Generating Metabolism | Yes | Yes /No | No | Ribosomes | Yes | Yes | No | Sensitive to Antibiotics | Yes | Yes | Yes | There are viruses that infect invertebrates‚ vertebrates‚ plants‚ protists‚ fungi‚ and bacteria. Viruses that infect bacteria are called bacteriophages‚ or phages. The nucleic acid of a virus is protected by a protein coat called the capsid. Each capsid is composed of protein subunits called capsomeres. In some viruses
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Microscopes were invented in the 1600s. Robert Hooke first looked at a thin slice of cork in 1665; he saw "a lot of little boxes." These little boxes first reminded of the little rooms monks lived in‚ so he called them cells. Hooke observed the same pattern in the stems and roots of carrots and other plants. What Hooke still did not know‚ however‚ was that cells are the basic units of living things. Ten years later‚ the Dutch scientist Anton van Leeuwenhoek focused a microscope on what seemed to
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asexual reproduction. A more stringent definition is agamogenesis which refers to reproduction without the fusion of gametes. Asexual reproduction is the primary form of reproduction for single-celled organisms such as the archaea‚ bacteria‚ and protists. Many plants and fungi reproduce asexually as well. While all prokaryotes reproduce asexually (without the formation and fusion of gametes)‚ mechanisms for lateral gene transfer such as conjugation‚ transformation and transduction are sometimes likened
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Origin of Earth and Evoluation of the Environment MODULE - 1 Environment through Ages 1 ORIGIN OF EARTH AND EVOLUTION OF THE ENVIRONMENT We live on a beautiful planet called earth‚ along with a wide variety of plants‚ animals and other organisms. Our earth‚ however‚ is part of a vast universe. The universe is about 15 to 20 billion years old. The age of the earth is approximately 4 to 5 billion years‚ while human beings evolved only around 2 million years ago. In this lesson‚ you shall learn
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