![Page 1: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/1.jpg)
1
Day 13We've been learning about organisms in different domains and kingdoms.
Are all of those organisms living?
Yes. The definition of an organism is "a living thing that can survive on its own." All organisms are living.
Living Things
DomainArchaea
DomainBacteria
DomainEukarya
![Page 2: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/2.jpg)
Single vs. Multicellular
Contrasting Case Activity 3Investigation 3 – Microscopic Life
![Page 3: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/3.jpg)
Organisms and Living Things
All organisms are living things.
Are all living things organisms?
![Page 4: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/4.jpg)
What do these two images have in common?How are they different?Are they both living?
Microscopic Images
![Page 5: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/5.jpg)
• Inside every cell, a number of important functions must occur.
• The cell must allow nutrients and gases in and out, and it must eliminate waste.
• Cells reproduce by splitting into new cells.
Life of a Cell
Where else have we seen these processes occur?
![Page 6: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/6.jpg)
• The cell is called the basic unit of life because it is the smallest unit capable of carrying out the functions of life.
• Some cells are part of a multicellular organism.• This kind of cell has two jobs: to carry out all the functions needed to keep itself alive, and to work with surrounding cells to help keep the organism alive.
The Basic Unit of Life
![Page 7: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/7.jpg)
• Can all cells survive on their own? • Could the cells pictured here survive without the rest of the organism?
Cells Working Together
![Page 8: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/8.jpg)
Compare Single Cells
What do these two cells have in common? How are they different?
![Page 9: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/9.jpg)
Compare Single Cells• Like a cheek cell, a paramecium is a single cell that carries out all the functions of life.
• Unlike a cheek cell, a paramecium can survive independent of the cells around it.
• This special quality makes a paramecium an organism as well as a cell.
Does living independently mean a paramecium does not need anything from its environment?
![Page 10: 1 Day 13 We've been learning about organisms in different domains and kingdoms. Are all of those organisms living? Yes. The definition of an organism is](https://reader035.vdocuments.us/reader035/viewer/2022062413/5a4d1b8a7f8b9ab0599be8f4/html5/thumbnails/10.jpg)
Discussion1.A 19th-century biologist studying cells
described them as leading a “double life.” What did he mean by this?
2.What clues might you look for to determine whether a cell is a single-celled organism or part of a multicellular organism?