Andre’ Bertrand Sean Comeaux Biology 1 1st October 2011 Animal Cells Every once living thing is composed of cells. Cells are small organisms that control everything in living things. When an organism is made of one or more cells it is called a multi cellular organism. The first person to discover cells was Richard Hooke. The cells that he saw were the dead cells of cork. When he first saw them they reminded him of the cells that nearby monks lived in. there are many different parts
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things 2.1 identify the major stages in the evolution of living things‚ including the formation of: - organic molecules - membranes - prokaryotic heterotrophic cells - prokaryotic autotrophic cells - eukaryotic cells - colonial organisms - multicellular organisms 2.5 process and analyse information to construct a timeline of the main events that occurred during the evolution of life on earth Identify: recognise and name construct: put together The Formation of organic molecules: Complex
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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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to life on land. As you can imagine‚ both organisms had challenges moving from this single cellular water environment to a multi-cellular land environment. While the change was difficult‚ this new environment would help organisms flourish in life‚ giving them the ability to reproduce more freely‚ and eat with less competition in their habitat. With moving‚ animals had to learn to adapt to their new environments. With the help of evolution‚ these organisms had to deal with a change in structural support
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population. It refers to the change in allelic frequencies that occur from generation to generation. There are three ways that microevolution can occur: mutation‚ genetic drift and natural selection. Mutation is the change in a gene of the DNA of an organism. This may change an allele and possibly the alleles frequency in the gene pool of the population. Genetic drift is an unpredictable change in a populations allelic frequencies from generation to generation. Genetic drift is also a change by chance
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differently than animals with bilateral symmetry. Unlike animals with bilateral symmetry‚ these organisms use their appendages‚ usually tentacles‚ to bring in food to its mouth‚ which is located at its center. Also‚ animals with radial symmetry have less complicated systems than animals with bilateral symmetry. The radial symmetry body plan involves appendages radiating out from the center of the organism‚ this means that most systems are not included in these animals. Since the radial symmetry
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a pollutant as "the occurrence of toxic substances or energy in a larger quality then the ecological communities or particular species can tolerate without suffering measurable detriment" (Freeman‚ 562). Although the effects of a pollutant on an organism vary depending on the dose and duration (how long administered). The impact can be one of sublethality to lethality‚ all dependent upon the factors involved. These factors need to be looked at when determining an ecosystem ’s disturbance by a pollutant
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10/19/2014 ANTH 021 ‚ Section 101: INTRO BIOL ANTH Submitted by HUANG‚ KAIYUAN (KXH5283) on 10/19/2014 8:59:21 PM Points Awarded 28.00 Points Missed 4.00 Points Ungraded 6.00 1. The Laetoli footprints are evidence that A) Lucy walked on all fours. B) Homo erectus hunted small animals. C) A. afarensis walked upright. D) Homo habilis traveled with dogs. Points Earned: 1.0/1.0 2. The oldest fossils of modern humans‚ archaic humans‚ and early hominins have all been found in
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traditional farming practices‚ ultimately destroying the communities and fragile land. Natural deserts‚ swamps and salt marshes need to be preserved to protect biodiversity and the integrity of the Earth’s ecology. Introducing genetically engineered organisms into the environment means that these areas could be invaded by these new species therefore furthering loss of natural ecosystems. A major concern of farmers and scientists regarding engineered crops is that they are afraid that these new plants
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CDC1 Study Questions LIVING ORGANISMS CELLULAR CHEMISTRY CELL BIOLOGY GENETICS PLANT BIOLOGY INVERTEBRATES AND VERTEBRATES ECOLOGY LIVING ORGANISMS CLASSIFICATION Compare and contrast living and nonliving things. What is biology? The study of living things (science of life) Describe characteristics found in all living organisms. * Living things are made of cells. * Living things obtain and use energy. * Living things grow and develop. * Living things reproduce
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