Question

name date class content practice a lesson 2 levels of organization directions: on the line before each definition, write the letter of the term that matches it correctly. each term is used only once. 1. a cell that can become many different cell types a. cell differentiation 2. a group of similar cells that work together to carry out a specific task b. stem cell c. tissue 3. a group of different organs that work together to complete a series of tasks d. organ 4. the process by which cells becomes different types of cells e. organ system f. organism 5. a group of organ systems that carry out all the jobs needed for their survival 6. a group of different tissues working together to perform a particular job directions: circle the term in parentheses that correctly completes each sentence. 7. cells work together in a (multicellular/unicellular) organism. 8. a cell in a (multicellular/unicellular) organism must carry out all the activities that are necessary to survive. 9. different types of cells in a multicellular organism have (different/the same) chromosomes. 10. multicellular organisms are (eukaryotes/prokaryotes).

Explanation:

1. A stem cell can differentiate into many different cell types.
2. Tissues are groups of similar cells working together.
3. Organs are groups of different tissues working together.
4. Cell differentiation is the process of cells becoming different types.
5. Organ systems carry out all necessary jobs for survival.
6. Organs are groups of different tissues working together.
7. Multicellular organisms have cells working together.
8. Unicellular organisms have one cell carrying out all activities.
9. Different types of cells in a multicellular organism have the same chromosomes (they just express different genes).
10. Multicellular organisms are eukaryotes (prokaryotes are usually unicellular).

Answer:

1. B. stem cell
2. C. tissue
3. D. organ
4. A. cell differentiation
5. E. organ system
6. D. organ
7. multicellular
8. unicellular
9. the same
10. eukaryotes