Page 89 - Science Course 1 (Book 1)

Mo3-L4: Vocabulary Review

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 B. stem cell
specific task C. tissue
3. a group of different organs that work together to complete a D. organ
series of tasks E. organ system
4. the process by which cells becomes different types of cells 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).

Mo3-L4: Key Concept Organizer

Directions: In the space at the left, write U next to each statement that correctly identifies unicellular
organisms. Write M next to each statement that identifies multicellular organisms. Write B next to each
statement that applies to both organisms.

1. These organisms consist of cells.
2. Each cell must carry out all life processes.
3. Cells are specialized and perform specific functions.
4. These organisms can be prokaryotes or eukaryotes.
5. These organisms are always eukaryotes.
6. Cells in these organisms differentiate.
7. These organisms have stem cells.
8. These organisms have tissues.
Directions: Respond to each statement on the lines provided.
9. Compare a prokaryotic cell and a eukaryotic cell.

10. Use your responses above to summarize the main differences between a unicellular organism and a
multicellular organism.

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