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**Exploring Life: Characteristics and Unity in Biology** Discover the 8 defining features of all living things and under

This title sums up an educational journey through the essential characteristics of life, touching on topics such as organization, energy utilization, reproduction, growth, response to the environment, evolution, homeostasis, and genetic code. It also explores the unity of life and diversity among organisms through hands-on observations and the concept of taxonomy. Dive into the fascinating world of biology with this comprehensive exploration.

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**Exploring Life: Characteristics and Unity in Biology** Discover the 8 defining features of all living things and under

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Presentation Transcript

  1. What is Biology?

  2. Biology is the Study of Life • Biologist study the interactions of life. • Entomologist • Anthropologist • Ornithologist • Botanist • Zoologist

  3. How does science define life? • There are 8 different Characteristics that an organism must have to be considered. • What might these be? http://www.youtube.com/watch?v=juxLuo-sH6M • Share with the person next to you and come up with 8 characteristics of all living things.

  4. Cells/Organization • Living things are highly organized: they are all composed of tiny living units called cells. • Cells are the smallest units that are considered alive. • Some organisms consist of only a single cell, others have trillions. • Multicellular • Unicellular Image from: http://www.time.com/time/daily/special/genetics/ethics.html

  5. Obtain and use energy • Living things take in energy to grow, develop and reproduce. • The chemical reactions that build up or break down materials is called metabolism. Image from http://photographytips.com/page.cfm/3575

  6. Reproduction • Individual organisms die, but the species continues because ofreproduction. • Reproduction without genetic contribution from two parents is calledasexual. • Sexualreproduction produces offspring with genetic material from both parents. Imae from http://www.karlloren.com/biopsy/p66.htm Image from http://www.cccturtle.org/contents.htm

  7. Growth and Development • Living things grow over their lifetimes. • Single- celled organisms increase their volume and multicellular organisms add to the number of cells in their body. • Development example: seed to apple tree Image from http://www.sosun.com/company.html

  8. Response to the Environment • When presented with the proper stimulus, a living organism will respond. • Example:chemical produced by a plant to keep caterpillars away. Image from http://greennature.com/gallery/caterpillar-pictures/cinnebar-caterpillar.html

  9. Living things evolve • Groups of organisms will evolve or change over time. • Evidence of these changes can be found in living things and fossils. • Darwin and Natural Selection provide the evidence satorismiles.com/.../

  10. Maintain stable internal environment • Organism must keep their internal environment stable even when the external environment changes. • Maintaining an organisms internal environment is referred to as homeostasis. Ex: humans internal temperature

  11. Universal genetic code • All information needed to live and grow is stored in a genetic code known as DNA. • Information is passed from parent to offspring. http://www.ucmp.berkeley.edu/glossary/gloss3/DNA2.gif

  12. Any Questions?Let’s review….What are the characteristics of life?Write down the characteristics we talked about today

  13. Do scientists consider this living? • Consider all 8 characteristics of life • Do you think a virus is living or not and defend your answer? http://s.hswstatic.com/gif/light-virus-1.jpg

  14. Unity and diversity of life How is the unity of life, the fact that all living things share the same characteristics explained?

  15. Let’s go outside! • Part 1- Collect and/or observe 5 specimens from outside. • They can be anything as long as we are not damaging the ecosystem • Write down observations during your time outside. • You have 10 minutes • You will come back inside and pair up with another person. • Compare your observations. Group your specimens together and indicate why you grouped them that way. • Make a list of similarities and differences.

  16. Unity: due to common ancestry Diversity: having different forms through adaptations in response to different environments http://www.riverdell.org/cms/lib05/NJ01001380/Centricity/Domain/85/evolutionary_tree_of_life.gif

  17. Diversity • Diversity of organisms has occurred through adaptations to different environments. • Which characteristic of life does this connect to? http://www.youtube.com/watch?v=nYBT1pC7uuA http://2.bp.blogspot.com/-1Lq_mfiF1BE/UGM7XK2RtzI/AAAAAAAAA_0/IutmR0TLYfw/s1600/BIOLOGY.png

  18. Taxonomy • Organization of organisms that have similar structures and function. • Why should we classify organaisms? http://www2.estrellamountain.edu/faculty/farabee/BIOBK/kingdoms.gif

  19. Six Kingdoms and 3 Domains http://go.hrw.com/venus_images/science/mbbios02005a.jpg

  20. Classification Carl Linneaus – developed modern taxonomy • Organized organisms based on common structures which reflects evolutionary relationships • Developed two part naming system called Binomial Nomeclature http://media-cache-ak0.pinimg.com/236x/da/83/07/da830730e48278b1393606ce552f8ccc.jpg

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