Chapter 1 Concepts and Methods in Biology I. What is Life? There is not a enclothe definition for life Life is better described by characteristics associated with life history organisms. Characteristics of life differentiate Living organism have a knotty organization. rule or Homeostasis relatively constant internal conditions. wont of hormones & receptors to check body levels normal Growth and developing pattern of crop and development characteristic of species. Energy utilization energy intake and transformation to perform all activities. ATP energy smidgin of life Response to the Environment response to stimuli. Reproduction, growth and development Ensures continuance of species. We inherit certain traits through deoxyribonucleic acid DNA (deoxyribonucleic sultry) is the molecule of life. Mutations - alternates in DNA that vary traits Evolving Ability to change over era. changing over a period of time due to the immanent weft of adaptive traits Adaptive traits: live on & reproduce Natural option: nature Artificial selection: breeding II. Are viruses live? Examples of Nonliving Entities A virus is a non-cellular infectious gene Viruses exist of a protein application surrounding a nucleic acid either DNA or ribonucleic acid but neer both.
Viruses cannot reproduce themselves. Bacteriophages A conference of viruses that infect bacterial cells and argon very useful in studies. 5 Basic go in Viral replica 1. Attachment Virus attaches to host cell 2. P enetration solid or part (usually D! NA/RNA) enters the cell. 3. Replication & synthesis The viral DNA/RNA directs the host cell into making sweet viral parts. 4. Assembly The viral parts are move 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:
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