5 out of 0.5 points Which of the following is not a property of life? Answer Selected Answer: Populations of organisms rarely change over time. Question 2 0.5 out of 0.5 points A newly discovered multicellular organism obtains food by digesting dead organisms. Such an organism is most likely a member of the kingdom ______. Answer Selected Answer: Fungi Question 3 0.5 out of 0.5 points Please use the following information
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Yeast‚ Chlamydomonas‚ Amoeba‚ Paramoecium www.topperlearning.com Few-celled Organisms made of a few hundred to few thousand cells. Examples: Spirogyra‚ Volvox Multi-celled Organisms made of millions to billions of cells. They are called multicellular organisms. Examples: Man‚ cow‚ mango tree‚ crow 2 SCIENCE CELL – STRUCTURE AND FUNCTIONS On the basis of size of cells Smallest cell: Examples: Bacteria (0.3–5.0 µm)‚ red blood cells (7 µm) Longest cell: Example: Nerve cell in the neck
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2. Biological Classification Classification The process of grouping living organisms into convenient categories based on simple characters is known as classification. 1. Two kingdom classification Carolus Linnaeus divided all living things into two kingdoms- Plantae and Animalia. 2. Five kingdom classification R.H. Whittaker divided all living things into five kingdoms- Monera‚ Protista‚ Fungi‚ Plantae‚ and Animalia. The main criteria for classification included o cell structure o thallus
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life that is classified as a living thing‚ and is often called the building block of life. The cell is the basic structural and functional unit of all known living organisms. Some organisms are unicellular (made of only one cell) while others are multicellular (made up of several cells). The word cell comes from the Latin cellula‚ meaning‚ a small room. The term was coined by Robert Hooke in a book he published in 1665 when he compared the cork cells he saw through his microscope to the small rooms monks
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In an article by the U.S. News called “Our Government Overlords‚” Antony Davies‚ an associate professor of economics at Duquesne University in Pittsburg‚ and James R. Harrigan‚ the CEO of FreedomTrust‚ argue that the government is exploiting the power of eminent domain‚ a clause that allows the government to take land if it’s going to better the entire community. They’re taking advantage of this clause by misleading the people that they’re property will be used to better the entire community‚ which
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Chapter 1 Introduction: Themes in the Study of Life PowerPoint® Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero‚ updated by Erin Barley with contributions from Joan Sharp Copyright © 2008 Pearson Education‚ Inc.‚ publishing as Pearson Benjamin Cummings Overview: Inquiring About the World of Life • Evolution • Biology Response Evolutionary to the environment adaptation • Life is recognized by what livings things do
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Frederick Griffith | This person made an experiment that involved injecting mice with pneumonia: smooth S cells‚ rough R cells‚ heat-killed S cells‚ and heat-killed S cells with living R cells. | Avery‚ McCarty‚ and MacLeod | First to show that DNA was the genetic material‚ but not believed. Repeated Griffith’s experiment‚ but subjected the strains to different enzymes‚ isolating RNA‚ DNA‚ lipids‚ carbohydrates‚ and proteins. Only the DNA killed the mice; the others had the mice survive. | Hershey
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differences between prokaryotic cells and eukaryotic cells are presented in Table 4.1 All cells have a plasma membrane‚ a cytoplasm‚ and genetic material. Prokaryotic cells lack a nucleus but possess a nucleoid region where the genetic material is located. Prokaryotic cells are surrounded by a cell wall and capsule‚ and they often move with the use of a flagella. The cytoplasm contains ribosomes for protein synthesis. 4.4 Eukaryotic Cells Eukaryotic cells‚ which are much larger than prokaryotic
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Viruses are tiny particles of DNA that have the potential to make people and animals extremely sick. It is ironic that viruses are very powerful‚ yet cannot reproduce by itself. They have various shapes‚ including rod-like‚ spherical‚ and phage. They generally have a similar structure: a protein coat called a capsid‚ a small amount of nucleic acid (DNA or RNA) that is located within the capsid. Important characteristics include: not living and no respiration. They can only reproduce within a host
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asexually (without the formation and fusion of gametes)‚ mechanisms for lateral gene transfer such as conjugation‚ transformation and transduction are sometimes likened to sexual reproduction. A lack of sexual reproduction is relatively rare among multicellular organisms‚ for reasons that are not completely understood. Current hypotheses suggest that‚ while asexual reproduction may have short term benefits when rapid population growth is important or in stable environments‚ sexual reproduction offers
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