Levels of Cellular Organization
How are living things organized?
They are organized into cells,tissues,organs,and organ systems.
What is a cell and what is an organism?
A cell is the smallest functional and structural unit of all living organisms. An organism is a living thing made up of one or more cells.
What are the characteristics of eukaryotic cells?
They have parts that protect and support the cell, and they have genetic material in the nucleus.
What is a prokaryote?
A prokaryote is a single-celled organism that does not have a nucleus or membrane-bound organelles.
Who discovered the cell?
It was discovered by Robert Hooke in 1665.
What is the connection between structure and function?
The structure will determine function.
Why are most cells small?
Cells are small because it takes in food and rids of wastes through the outer layer.
What organelles are found in plant and animal cells?
There are mitochondria, ribosomes, endoplasmic reticulum, and the Golgi complex.
What is a eukaryote?
A eukaryote is an organism made up of cells that contain their DNA in a nucleus.
Who discovered bacteria?
Anton van Leeuwenhoek discovered bacteria.
What tasks do systems perform to meet the needs of cells?
They deliver nutrients, oxygen, and they remove waste.
What is the Cell Theory?
The cell theory is:
1. All organisms are made up of one (unicellular organisms) or more cells (multicellular organisms).
2. The cell is the basic unit of all organisms.
3. All cells come from existing cells.
What additional parts are found in plant cells?
There is a cell wall, chloroplasts, and a large central vacuole.
What are examples of eukaryotes?
Animals, plants, protists, and fungi are examples of eukaryotes.
Which were the two people that came up with the cell theory?
Matthias Schleiden and Theodor Schwann.
What is an organism?
An organism is a living thing that can carry out life processes by itself.
What parts do all cells have in common?
All cells have a cell membrane, cytoplasm, some organelles, and DNA(deoxyribonucleic acid).
What additional part is found in animal cells?
There are lysosomes.
What special things do prokaryotes have?
Prokaryotes have hairlike structures called flagella that help them move around.
Who discovered that all cells come from existing cells?
Rudolph Virchow.