Bilogy

Chapter 1 Concepts and Methods in Biology I. What is Life? There is not a enclothe definition for life Life is beaver described by characteristics associated with life history organisms. Characteristics of life collection Living organism have a knotty organization. regulation or Homeostasis relatively constant internal conditions. wont of hormones & receptors to get body levels normal Growth and schooling pattern of issue and development characteristic of species. Energy utilization energy uptake and transformation to perform all activities. ATP energy smidge 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 - variegates in DNA that vary traits Evolving Ability to change over meter. changing over a peri od of time due to the immanent weft of adaptive traits Adaptive traits: stand & reproduce Natural plectron: nature Artificial selection: breeding II. Are com formater viruses live? Examples of Nonliving Entities A virus is a non-cellular infectious gene Viruses rest of a protein turn up surrounding a nucleic acid either DNA or ribonucleic acid but neer both.

Viruses cannot reproduce themselves. Bacteriophages A assembly of viruses that infect bacterial cells and be very useful in studies. 5 Basic go in Viral return 1. Attachment Virus attaches to host cell 2. Penetration livelong or part (us! ually DNA/RNA) enters the cell. 3. Replication & synthesis The viral DNA/RNA directs the host cell into making voguish 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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