evolutionary biologists to suggest that some organelles are descendants of free- living prokaryotic organisms that came to inhabit larger cells. Present day prokaryotes are similar to fossil prokaryotes‚ some of which are 3500 million years old. By comparison‚ the earliest eukaryote cells date back only 1000 million years. Thus eukaryotes must have evolved‚ surrounded by prokaryotes that were long-established organisms. It is possible that‚ in the evolution of the eukaryotic cell‚ prokaryotic cells came to
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Millions of species inhabit Earth. How do scientists make sense of them all? First‚ scientists study the similarities and differences between organisms. The scientists study characteristics including obvious physical traits‚ such as hair or leaves‚ and molecular traits‚ such as DNA sequences. Then‚ scientists use the information to classify species into meaningful groups. The groups may also reveal which species are related and how they fit along the evolutionary tree. Scientists who specialize in
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ENVIRONMENT A Term Paper Submitted As A Minimum Requirement In English IV TO: Mrs. Rosalie L. Bustamante (English Teacher) BY: Miko Glenn G. Saballa IV Garnet TABLE OF CONTENTS i. About the Author 1 ii. Acknowledgement 2 iii. Dedication 3 iv. Thesis Statement 4 Chapter 1 Environment A. Introduction 5 B. Background of the study 6 C. Purpose of the study 7 D. Statement of the
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most obvious statement which says that science is right is Evolution. Evolution is a scientific theory that explains the origins of humanity and its development. Evolution is where a living organism adapts and evolves to become less primitive‚ and more likely to survive. It is NOT random. Not a single living organism that has ever been discovered shows any sign whatsoever of having evolved by non-Darwinian means. Evolution
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the secrets of nature’s evolutionary process when an Austrian monk named Gregor Mendel developed the first "laws of heredity." Using these laws‚ scientists studied the characteristics of organisms for most of the next one hundred years following Mendel’s discovery. These early studies concluded that each organism has two sets of character
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List the qualities (at least 6) that define life AND discuss how a single-celled organism‚ such as an Amoeba or a yeast cell‚ and a more complex one‚ such as a tree or a cat‚ matches up with each characteristic 1. Living things have cells. 2. Living things grow 3. Living things reproduce 4. Living things respond to stimuli 5. Living things use energy 6. Living things adapt to their environment A single celled organism‚ such as an Amoeba‚ has a short life because of the heavy work load and exposure
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Definition of Microorganism Microorganism (from the Greek: mikrós‚ "small" and organismós‚ "organism") is an organism that is microscopic (usually too small to be seen by the naked human eye). Microorganisms live in all parts of the biosphere where there is liquid water‚ including soil‚ hot springs‚ on the ocean floor‚ high in the atmosphere and deep inside rocks within the Earth’s crust. Microorganisms are critical to nutrient recycling in ecosystems as they act as decomposers
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Biological weapons are living organisms‚ whatever their nature‚ or the materials that are created because of their use. Biological weapons can cause disease or death in living organisms‚ and are depended upon for their further ability to multiply inside the organism that it attacks. Chemical weapons are defined as chemical substances of gas‚ liquid‚ or solid which are used because of a directly toxic effect upon humans‚ animals‚ or plants. Even though the two weapons are closely related‚ chemical
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BIOTECHNOLOGY AND ITS APPLICATIONS Biotechnology is the use of living systems and organisms to develop or make useful products‚ or "any technological application that uses biological systems‚ living organisms or derivatives thereof‚ to make or modify products or processes for specific use. For thousands of years‚ humankind has used biotechnology in agriculture‚ food production‚ and medicine.[2] The term itself is largely believed to have been coined in 1919 by Hungarian engineer Károly Ereky. In
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Chapter 1. Describing life and science 1. Which is the correct sequence for levels of biological organization within an organism? • Atom-molecule-organelle-cell-tissue 2. Which is the correct sequence for levels of biological organization occurring beyond the individual? • Population-community-ecosystem-biosphere 3. To be considered a living organism‚ the organism must consist of • one or more cells 4. Which is not a required characteristic of life? Movement 5. “The most restrictive
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