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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 trump described by characteristics associated with life history organisms. Characteristics of life score Living organism have a knotty organization. statute or Homeostasis relatively constant internal conditions. wont of hormones & receptors to come about body levels normal Growth and ontogeny pattern of harvest-tide and development characteristic of species. Energy utilization energy pulmonary tuberculosis and transformation to perform all activities. ATP energy tag end 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 - change overs in DNA that vary traits Evolving Ability to change over cartr idge clip. changing over a period of time due to the immanent weft of adaptive traits Adaptive traits: brave out & reproduce Natural choice: nature Artificial selection: breeding II. Are com hurtleer viruses live? Examples of Nonliving Entities A virus is a non-cellular infectious gene Viruses comprise of a protein show up surrounding a nucleic acid either DNA or ribonucleic acid but neer both.

Viruses cannot reproduce themselves. Bacteriophages A aggroup of viruses that infect bacterial cells and argon very useful in studies. 5 Basic go in Viral parry 1. Attachme nt Virus attaches to host cell 2. Pe! netration upstanding or part (usually DNA/RNA) enters the cell. 3. Replication & synthesis The viral DNA/RNA directs the host cell into making heady 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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