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CRCT PRACTICE. S7L1. Students will investigate the diversity of living organisms and how they can be compared scientifically. . a. Demonstrate the process for the development of a dichotomous key. Taxonomy – the practice of naming organisms and classifying them into groups .

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S7L1. Students will investigate the diversity of living organisms and how they can be compared scientifically.


A demonstrate the process for the development of a dichotomous key
a. Demonstrate the process for the development of a dichotomous key.

  • Taxonomy – the practice of naming organisms and classifying them into groups.


  • Dichotomous Key dichotomous key. – one way scientist classify items in the world

    • You must begin with the characteristics – pay close attention o unique characteristics


  • Then write dichotomous key.pairs of choices

  • Start with the most general characteristics

    • Does the bird fly?

    • 1. a. Flies go to 2

      b. does not fly go to 3


b. Classify organisms based on physical characteristics using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).


  • Classification using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals). System – the process of organizing organism into groups

    • Organisms are placed in groups based on characteristics



  • Levels of Classification using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Kingdom

    • Phylum

    • Class

    • Order

    • Family

    • Genus

    • Species


  • Ways Organism can be classified using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Type of Cell

      • Eukaryotic (contains nucleus)

      • Prokaryotic (no nucleus)


  • Cell Structure using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Presence of Nucleus

    • Presence of a Cell Wall

  • Number of Cells

    • Unicellular – organisms made of 1 cell

    • Multicellular – organism made of more than one cell


  • Nutrition using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Autotrophs – organism can make its own food

    • Heterotroph – organism get nutrient by eating other organism


  • 5 Kingdoms using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Bacteria (Archeabacteria & Eubacteria)

    • Protista

    • Fungi

    • Plantae

    • Animalia


  • Bacteria Kingdom using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Type of Cell – Prokaryotic

    • Cell Structure – contains cell wall

    • Number of Cells – unicellular

    • Nutrition – autotrophs and heterotrophs


  • Protista Kingdom using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Type of Cell – Eukaryotic

    • Cell Structure – contains cell wall

    • Number of Cells – most unicellular some are multicellular



  • Fungi Kingdom using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Type of Cell – Eukaryotic

    • Cell Structure – contains cell wall

    • Number of Cells – most unicellular, some multicellular

    • Nutrition – heterotrophs


  • Plantae Kingdom using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Type of Cell – Eukaryotic

    • Cell Structure – contains cell wall; chloroplast

    • Number of Cells –multicellular

    • Nutrition – autotrophs


  • Animalia Kingdom using a dichotomous key of the six kingdom system (archaebacteria, eubacteria, protists, fungi, plants, and animals).

    • Type of Cell – Eukaryotic

    • Cell Structure – No cell wall or chloroplast

    • Number of Cells –multicellular

    • Nutrition – heterotrophs


S7l2 students will describe the structure and function of cells tissues organs and organ systems
S7L2. Students will describe the structure and function of cells, tissues, organs, and organ systems. .






  • Selectively Permeable inside and out of the cell – describes how a membrane allows some things to go across and others can’t

  • Osmosis – Movement of water into and out of the cell to reach equilibrium.


  • Facilitated Diffusion inside and out of the cell – uses protein channels in order to move materials across the membrane.




b. Relate cell structures (cell membrane, nucleus, cytoplasm, chloroplasts, mitochondria) to basic cell functions.





Not found in animal cells
Not Found in Animal Cells cell

  • Cell Wall – stiff outer layer that surrounds the cell membrane

  • Chloroplast – organelles capture sunlight and convert it to food



c. Explain that cells are organized into tissues, tissues into organs, organs into systems, and systems into organisms.



  • Cells systems. The entire organism is composed of several organ systems. are specialized for specific purposes

    • Red blood cells carry oxygen

    • Nerve cells transmit information throughout the body


  • Tissue systems. The entire organism is composed of several organ systems. – a group of cells that work together.

  • Organs – tissues that work together to perform a function.



d. Explain that tissues, organs, and organ systems serve the needs cells have for oxygen, food, and waste removal




e. Explain the purpose of the major organ systems in the human body (i.e., digestion, respiration, reproduction, circulation, excretion, movement, control, and coordination, and for protection from disease).


S7L2. Students will describe the structure and function of cells, tissues, organs, and organ systems. a. Explain that cells take in nutrients in order to grow and divide and to make needed materials. b. Relate cell structures (cell membrane, nucleus, cytoplasm, chloroplasts, mitochondria) to basic cell functions. c. Explain that cells are organized into tissues, tissues into organs, organs into systems, and systems into organisms. d. Explain that tissues, organs, and organ systems serve the needs cells have for oxygen, food, and waste removal. e. Explain the purpose of the major organ systems in the human body (i.e., digestion, respiration, reproduction, circulation, excretion, movement, control, and coordination, and for protection from disease). S7L3. Students will recognize how biological traits are passed on to successive generations. a. Explain the role of genes and chromosomes in the process of inheriting a specific trait. b. Compare and contrast that organisms reproduce asexually and sexually (bacteria, protists, fungi, plants & animals). c. Recognize that selective breeding can produce plants or animals with desired traits. S7L4. Students will examine the dependence of organisms on one another and their environments. a. Demonstrate in a food web that matter is transferred from one organism to another and can recycle between organisms and their environments. b. Explain in a food web that sunlight is the source of energy and that this energy moves from organism to organism. c. Recognize that changes in environmental conditions can affect the survival of both individuals and entire species. d. Categorize relationships between organisms that are competitive or mutually beneficial. e. Describe the characteristics of Earth’s major terrestrial biomes (i.e. tropical rain forest, savannah, temperate, desert, taiga, tundra, and mountain) and aquatic communities (i.e. freshwater, estuaries, and marine). S7L5. Students will examine the evolution of living organisms through inherited characteristics that promote survival of organisms and the survival of successive generations of their offspring. Georgia Department of Education Kathy Cox, State Superintendent of Schools 8/29/2006 2:52 PM Page 7 of 8 a. Explain that physical characteristics of organisms have changed over successive generations (e.g. Darwin’s finches and peppered moths of Manchester). All Rights Reserved Approved July 13, 2006 b. Describe ways in which species on earth have evolved due to natural selection. c. Trace evidence that the fossil record found in sedimentary rock provides evidence for the long history of changing life forms.


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