Biol 160 Human Biology Quiz 1 Name:Layla Atkins DEFINITIONS (2 pts each) Define the following terms. Remember - you can’t use the word you are defining in its definition! 1. Homeostasis – The ability of an organism or cell to maintain the same internal environment regardless of changes in the external environment. 2. Metabolism –The chemical reaction that occur in a cell. 3. Experiment –Procedures used to test a hypothesis. 4. Control group – Subject(s) that goes through the
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Differentiating Between Prokaryotic and Eukaryotic Cells‚ Distinguish Among Plant‚ Animal‚ and Protist Cells‚ and Identifying the Organelles that are Evident in Them Introduction There are two different types of cells‚ prokaryotes and eukaryotes. Prokaryotes‚ such as bacteria‚ lack a nuclear membrane and other membrane bound organelles. Their genetic material consists of a single molecule of singular DNA. Eukaryotes‚ such as plant and animal cells‚ have a nuclear membrane and other membrane
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spread by a meteorite to the Earth where it found an environment that allowed it to thrive and evolve into what it is today. Another theory is that heterotrophs were the first living organisms on the planet. “According to the heterotrophic hypothesis the first living beings were very simple heterotrophic organisms‚ i.e.‚ not producers of their own food‚ which emerged from the gradual association of organic molecules into small organized structures (the
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radio‚ thought that this was very strange. In the past‚ they had thought about there being a time when strange organisms from outer space would come to Earth‚ and try to take over. They decided that they would design a building that could be used to research the different things that they might come across in the future. This building would have to be very sterile so that the organisms couldn’t contaminate anything and destroy the Earth. The building was five stories high and each level was more
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theory. States that the living world is neither constant nor perpetually cycling‚ but is always changing. Characteristics of organisms undergo changes across generations Gained acceptance when Darwin advocated it in his other four theories Perpetual change is clearly documented by the fossil record‚ which clearly refutes any claim that modern organisms originated in the recent past Perpetual change is regarded as fact o Common Descent States that all forms of life originated from
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and nonliving organisms and consists of particular physical components that allow each to interact with one another. All these organisms are designed to accomplish the common purpose of processing nutrients‚ discarding wastes‚ responding to environmental stimuli‚ and reproducing within the particular environment. For example‚ organisms are inhabited in a community. The costal community is comprised of pelicans that eat the fish in the ocean. In addition‚ a diverse range of organisms survive together
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essay will talk about about how characters were genetically modified. Genetic engineering is the altercation of the DNA in an organism genomes. Scientists pick a gene that they will alter‚ remove the gene or add a new gene. They split the DNA down the center of the double helix and then pair it with the suitable chemical. Then the gene is transferred into the new organism. Genetic engineering is used in the movie GATTACA to genetically modified Anton‚ the main characters brother Vincent‚ a woman
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identical copies of existing organisms or object. The copied object has the same genetic makeup as the original‚ the copied material is a clone. Scientist have cloned many biological materials such as genes‚ cells‚ tissues‚ and whole organism like dolly the sheep. There is also natural clones‚ some plants and single celled organisms like bacteria make genetically identical off springs through a process called asexual reproduction. In asexual reproduction‚ a new organism is made from a copy of a single
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Genes are molecular units of heredity which encode for different types of traits. Each organism has traits that are defined phenotypically and can be studied though the field of genetics. Genetics is the study of genes‚ heredity‚ and how they cause variation in different living organisms. Scientists study genetic pattern in different organisms to determine the different trends in a certain population. In every organism‚ we obtain one allele from each parent. Alleles are types of genes that can be identified
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Causes and spread of infection. 1.1 Viruses are pieces of nucleic acid wrapped in a thin coat of protein that replicate only within cells of living host. Bacteria are one cell micro-organisms with simple cellular organizations whose nucleus lacks a membrane. Parasites may be protozoa‚ yeast or multi cellular organisms such as fungi or worms that live in or on a host to obtain nourishment without providing any benefit to the host. Fungi there are many different varieties of fungi‚ and we eat quite
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