Definitions: Species: A group of organisms that interbreed and produce fertile offspring e.g. horses and donkeys Population: A group of organisms of the same species living in the same area at the same time‚ and which are capable of interbreeding Biodiversity: The amount of biological or living diversity per unit area. It includes the concepts of species diversity‚ habitat diversity and genetic diversity. Species diversity: Both the range and number of organisms found in a single place or habitat
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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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All living organisms are composed of one or more cells‚ and like any living organism‚ cells are made up of smaller structures that help them function. In the context of cells‚ these smaller structures are referred to as organelles and each organelle has its own unique function that has developed over time. While we are typically aware of how these organelles function‚ how they evolved raises several questions. The main model for how eukaryotic cells evolved over time is the endosymbiont theory. This
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Cephalochordata. This organism may be tiny in size‚ but their impact on human evolution is tremendous! Carol MacKintosh‚ a professor in the College of Life Sciences at the University of Dundee‚ defines them as “…a very distant cousin to humans and other vertibrates. It is the creature most similar to the original spineless organism that existed before a major genomic event occurred.” A new study indicates a genetic error‚ which took place 500 million years ago‚ led to human evolution. This organism went through
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This is a mixture of medicine and biology‚ which analyses the effects of a drug on a cell‚ tissue‚ organ or organism. A pathologist is what Sir Howard Florey did‚ in studying diseases‚ learning about it and diagnosing the disease. His best-known work dates from his collaboration with chain‚ which began in 1938 when they conducted investigation of the properties
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Impact of Humans on the Biological Diversity of Natural Ecosystems Introduction Since humans have come into existence they have always been a cause of change of whatever natural areas they inhabit along with the living organisms of those natural areas. The different types of organisms such as plants‚ animals‚ and microorganisms that inhabit these areas are known as biological diversity or biodiversity. (USEPA 2010 ) Biological diversity can be affected by many different things‚ climate change‚ and
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CHARACTERISTICS OF LIVING AND NON-LIVING THINGS 1. COMPLEX DEFINITION- Living things is composed of one or more cells. 2 KINDS OF CELL 1. UNICELLULAR- It is one celled organisms. 2. MULTI-CELLULAR- organisms composed of many cell. 2.METABOLISM- the sum of all different chemical activities carried out by living things. 2 SETS OF METABOLIC REACTIONS 1. CATABOLISM- all reactions that break own substances. 2. ANABOLISM-all
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Assessment The structural features of the pill bug allows it to have advantages over other organisms. The pillbugs multi-segmented body allows it to roll into a ball if it feels threatened or in danger in order to protect its self. Another advantage of have a multi-segmented body is it allows the pillbug to semi curl to flip its self back over if it is knocked down. The antennae is used to sense the environment around it‚ even if it is in ball shape form. The advantages of this is the pillbug
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Human Biology‚ 7e (Johnson) Chapter 1 Human Biology‚ Science‚ and Society 1.1 Multiple Choice Questions 1) The branch of science that studies living organisms and their life processes is A) biology B) geology C) chemistry D) physics Answer: A Topic: Sec. 1.0 Skill: Knowledge/Comprehension 2) The process by which living organisms maintain a fairly constant internal environment despite changes in the external environment is known as A) metabolism B) biology C) homeostasis D) evolution
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The organisms first believed to live on Earth were the Prokaryotes. Prokaryotes have many differences and similarities to a Eukaryote. For an example‚ their names sound similar yet they are not the same so that makes them different. Since there are so many organisms‚ the organisms are separated into those two broad categories. Prokaryotes are nearly always a unicellular organisms. An example of a Prokaryote is bacteria and archaea . Prokaryotes do not contain a nucleus or a membrane that should
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