Question

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
2. a group of similar cells that work together to carry out a specific task
3. a group of different organs that work together to complete a series of tasks
4. the process by which cells becomes different types of cells
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.

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. Stem cells have the potential to differentiate into various cell types.
2. Tissues are made up of similar cells performing a specific function.
3. An organ system consists of different organs working together.
4. Cell differentiation is the process by which cells become different types.
5. An organism is composed of organ systems carrying out all survival - related jobs.
6. An organ is formed by different tissues working together.
7. In multicellular organisms, cells work together.
8. In unicellular organisms, a single cell must carry out all survival activities.
9. Different types of cells in a multicellular organism have the same chromosomes (they just express different genes).
10. Multicellular organisms are eukaryotes as prokaryotes are mostly unicellular.

Answer:

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