READING MATERIAL 1. Explain the three hypotheses for the recent changes in the toxicity of venom in different species of rattlesnakes found in the United States. - Interbreeding between snakes with different venom profiles. - Geographic distribution (genes shifted eastward) - Convolution - Old rattlesnakes have high concentration of toxic. 2. What is an “evolutionary arms race”? Describe how this applies to one of the hypotheses suggested to explain toxicity of venom in rattlers
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class your group will be asked to answer the following question: The regulatory mechanisms that an organism uses result from an evolutionary process. Some organisms regulate their internal body temperature‚ and others do not. Make two suggestions as to what the “evolutionary advantage” might be for each of these two‚ quite different‚ lifestyles. Why this Material? Each of the living organisms on the planet Earth has evolved a distinctive body form (morphology) at a variety of levels: cellular
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things share one common feature: all living organisms are composed of cells. The development of this concept began with Robert Hooke’s seventeenth-century observation that slices of cork were made up of small units he called "cells.” Over the next 100 years‚ the cell theory emerged. It was formally (and independently) presented by Schleiden and Schwann in 1839‚ and clarified by Virchow a few years later. This theory has three principles: (1) All organisms are composed of one or more cells. (2) All
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o / ► Chapter 01 Quiz Started on Saturday‚ September 8‚ 2012‚ 05:46 PM Completed on Saturday‚ September 8‚ 2012‚ 05:57 PM Time taken 11 mins 17 secs Grade 9.00 out of a maximum of 10.00 (90%) Question 1 Correct Mark 1.00 out of 1.00 Flag question Question text Many insects do not see into the red color-range and as a result‚ many insect-pollinated flowers are colors other than red (e.g.‚ purple and yellow). This flower coloration would be considered a Select one: a. adaptation.
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living organisms are categorized • discuss the origin of life‚ the RNA world‚ and the evolution of microorganisms CHAPTER OUTLINE I. Microbiology—Introduction A. Microbes are found everywhere and are indispensable for cycling of essential elements on earth B. Most microbes are beneficial to society by producing foods‚ oxygen‚ and commercial products‚ and by enhancing human health; some microbes cause disease II. Members of the Microbial World A. Microbiology is the study of organisms too small
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Biology- study of living organisms. I. History of Biology 1. Primitive Period-no use of scientific period. 2. Classical Period * Hippocrates (Father of Medicine)- he stated that diseases have natural causes and the has the power to repair itself. * Aristotle (Greatest Ancient Scientist)- excelled in making observations made the most significant biological contributions. * Galen (Greatest Biologist of Antiquity)- to study human anatomy and carried with the first physiological
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true? A cell is _____. A) only found in multiples of two‚ because single cells cannot exist independently B) always between 200 and 500 micrometers in diameter C) characteristic of eukaryotic but not prokaryotic organisms D) characteristic of both prokaryotic and eukaryotic organisms Answer: D Reference: Section 1.4 Bloom’s Taxonomy: Level 1 Knowledge 2) How does a scientific theory differ from a scientific hypothesis? A) Theories are proposed to test scientific hypotheses. B) A theory
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Describe the importance of each of these properties. STB1013 Cell Biology Basic Properties of Cells Life is the most basic property of cells; they are the smallest units to exhibit this property; plant or animal cells can be removed from organism & cultured in laboratory Cultured cells are simpler to study than cells in body; cells grown in vitro (in culture‚ outside the body) have become essential tool of cell & molecular biologists STB1013 Cell Biology Basic Properties of Cells
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Cloning of Animals The cloning of animals is a process in which a single cell is taken from the parent organism and is used to reproduce a genetically identical organism. The animal cloned represents an exact duplicate of its parent in every way‚ the one exception of that is the original and cloning will not have the same DNA. The first cloning of an animal was of a sheep named Dolly. An instance of animal cloning is‚ development of twins from a single fertilized egg and asexual reproduction. The
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Notes Getting Your Act Together Cell Theory Cells are the basic structural and functional units of life. In multicellular organisms different cells perform different functions. Different types of cells work together so that the organism functions as a co-ordinated whole Unicellular and Multicellular Organisms A multicellular organism is made up of many cells A unicellular organism only has one cell Plant Cell Animal Cell Basic Requirements Needed By Cells
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