CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S. and worldwide. Using an open-source, collaborative, and web-based compilation model, CK-12 pioneers and promotes the creation and distribution of high-quality, adaptive online textbooks that can be mixed, modified and printed (i.e., the FlexBook® textbooks). Copyright © 2022 CK-12 Foundation, www.ck12.org The names “CK-12” and “CK12” and associated logos and the terms “FlexBook®” and “FlexBook Platform®” (collectively “CK-12 Marks”) are trademarks and service marks of CK-12 Foundation and are protected by federal, state, and international laws. Any form of reproduction of this content in any format or medium, in whole or in sections, must be attributed according to our attribution guidelines. https://www.ck12info.org/about/attributionguidelines Except as otherwise noted, all CK-12 Content (including CK-12 Curriculum Material) is made available to Users in accordance with the CK-12 Curriculum Materials License https://www.ck12info.org/curriculummaterials-license Complete terms for use for the CK-12 website can be found at: http://www.ck12info.org/terms-of-use/ Printed: November 3, 2022 1 www. c k 12 .org Cell organization Worksheet Visit CK12.org for Free Online Practice 1. Single-celled organisms depend on others to carry out their life processes. a. TRUE b. FALSE 2. Tissues group together and join to form _____. a. b. c. d. Cells Tissues An organ All of the above 3. Organisms with more than one type of cell and which have specialized cells to perform specialized functions are _____. a. b. c. d. Multicellular organisms Unicellular organisms Acellular organisms None of the above 4. The amoeba is a single-celled _____. a. b. c. d. Protist Fungi Mammal None of the above 5. Volvox is an example of a colonial organism. Each Volvox is made up of between _____ photosynthetic algae. a. 1 to 10 b. 1,000 to 3,000 c. 4,000 to 5,000 2 www. c k 12 .org d. 100 to 200 6. Cells from a colonial organism can survive independently. a. TRUE b. FALSE 7. Fill in the blank(s): Complete the sentence using one of the following words: organ, organelle, or tissue. A(n) ____________________ is a group of connected cells with the same kind of function. 8. Fill in the blank(s): Complete the sentence using one of the following words: Multicellular or Colonial. ____________________ organisms have many types of cells that carry out specialized functions. 9. Fill in the blank(s): The ____________________ is the basic unit of life. 10. Colonial organisms were probably one of the first evolutionary steps towards unicellular organisms. a. TRUE b. FALSE 3 www. c k 12 .org Answer Keys 1. FALSE 2. An organ 3. Multicellular organisms 4. Protist 5. 1,000 to 3,000 6. TRUE 7. tissue 8. Multicellular 9. cell 10. FALSE 4
