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Characteristics, Needs and Classification of Living Things

Explore the characteristics, needs, and classification of living things. Learn about the 7 signs of life, including organization, response to the environment, chemical reactions, energy intake, growth, reproduction, and lifespan. Discover the needs of living things such as water, food, light, temperature, living space, and oxygen. Understand the concept of classification and the eight levels of classification: domain, kingdom, phylum, class, order, family, genus, and species.

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Characteristics, Needs and Classification of Living Things

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  1. Characteristics, Needs and Classification of Living Things Diversity of Life

  2. 7 Signs of life • Biologists believe there are 7 signs of life: • Organization • Respond to Their Environment • Perform Chemical Reactions • Take in Energy • Grow • Reproduce • Die

  3. Organization • Made up of at least one cell

  4. Respond to environment • Some can move from place to • place • Some respond to gravity, • light, and temperature

  5. Perform chemical reactions • Breaking down food to release energy (cellular respiration) • Building new cells (mitosis and meiosis) • Transport of needed materials • Excrete waste products

  6. Take in energy • Consumers (heterotrophs) or producers (autotrophs)

  7. gRow • Grow and develop • Some organisms just get larger in size • Some organisms change shape as they grow

  8. reproduce • To male more of the species • Sexually • 2 parents • not identical offspring • Asexually • 1 parent • Genetically identical

  9. die • Every living thing has life span • Some have very short and some have very long lifespans • Some live a few days or weeks and other live thousands of years

  10. Needs of living things • Water • Food • Light • Temperature • Living Space • Oxygen

  11. Water and food • FOOD • Provide energy for the organism • Some decompose, some eat and some make their own • WATER • Transport materials needed throughout the organism • Dissolves minerals

  12. Light and temperature • Temperature • Some live in warmer temperatures and others in cooler temperatures • Light • Sunlight used to make food for producers

  13. Living Space • An organism’s living space provides for: • Needed resources • Mate • Because of limited • space on Earth, there • is competition

  14. oxygen • Needed for respiration in order to release the energy from nutrients

  15. What is classification? • Classification is the grouping of things according to characteristics • The science of classifying organisms is known as taxonomy

  16. Early classification systems • Aristotle grouped animals according to the way they moved • John Ray was the first to use the term “species”

  17. Binomial Nomenclature • Developed by Linnaeus • Two-name system • Each organism has a genus and a species name • First name (genus); second name (species)

  18. What is a scientific name? • Combination of the genus and species name of an organism • Scientific names of organisms are always italicized or underlined: (Genus is capitalized & species name is lower-case)

  19. Eight classification groups of living things • Order • Family • Genus • Species • Domain • Kingdom • Phylum • Class

  20. Domain Eight Levels of classification D id K ing P hillip C ome O ver F or G ood S oup

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