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
3. a group of different organs that work together to complete a series of tasks c. tissue
4. the process by which cells becomes different types of cells d. organ
5. a group of organ systems that carry out all the jobs needed for their survival e. organ system
6. a group of different tissues working together to perform a particular job f. organism

directions: circle the term in parentheses that correctly completes each sentence.

1. cells work together in a (multicellular/unicellular) organism.
2. a cell in a (multicellular/unicellular) organism must carry out all the activities that are necessary to survive.
3. different types of cells in a multicellular organism have (different/the same) chromosomes.
4. multicellular organisms are (eukaryotes/prokaryotes).

Explanation:

1. A stem cell (B) can differentiate into many different cell types.
2. A tissue (C) is a group of similar cells working together.
3. An organ (D) is a group of organs working together.
4. Cell differentiation (A) is the process of cells becoming different types.
5. An organism (F) is a group of organ systems.
6. An organ (D) is a group of tissues working together.
7. In a multicellular organism, cells work together.
8. A cell in a unicellular organism must carry out all survival activities.
9. Different types of cells in a multicellular organism have the same chromosomes.
10. Multicellular organisms are eukaryotes.

Answer:

1. B
2. C
3. D
4. A
5. F
6. D
7. multicellular
8. unicellular
9. the same
10. eukaryotes