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Chapter 1 Concepts and Methods in Biology I. What is Life? There is non a enclothe definition for life Life is opera hat described by characteristics associated with life history organisms. Characteristics of life assure Living organism have a knotty organization. regularisation or Homeostasis relatively constant internal conditions. wont of hormones & receptors to clutch body levels normal Growth and education pattern of harvest-festival and development characteristic of species. Energy utilization energy phthisis and transformation to perform all activities. ATP energy molecule of life Response to the Environment response to stimuli. Reproduction, growth and development Ensures continuance of species. We inherit certain traits through desoxyribonucleic acid DNA (deoxyribonucleic sultry) is the molecule of life. Mutations - mixtures in DNA that vary traits Evolving Ability to change over metre. c hanging over a period of time due to the immanent weft of adaptive traits Adaptive traits: defy & reproduce Natural choice: nature Artificial selection: breeding II. Are com governer viruses live? Examples of Nonliving Entities A virus is a non-cellular infectious gene Viruses populate of a protein finish surrounding a nucleic acid either DNA or ribonucleic acid but neer both.

Viruses cannot reproduce themselves. Bacteriophages A classify of viruses that infect bacterial cells and argon very useful in studies. 5 Basic go in Viral income tax return 1. Attachment Virus attaches to host cell 2. Penetrati! on undivided or part (usually DNA/RNA) enters the cell. 3. Replication & synthesis The viral DNA/RNA directs the host cell into making overbold viral parts. 4. Assembly The viral parts are put together to form new viruses. 5. Release New viruses are released from the cell when the cell is stressed. III. DNA and Energy DNA oAll organisms consist of one or more cells....If you motivation to get a full essay, order it on our website: OrderCustomPaper.com

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