Cell Theory
What does the first part of cell theory state?
All organisms are composed of cells.
The process by which plants, algae, and some bacteria use sunlight, carbon dioxide, and water to make food.
Photosynthesis
Contains DNA; controls many of the cell's functions.
Nucleus
What is the difference in shape of plant and animal cells?
Plant cells are typically more rectangular, while animal cells are typically more circular.
This scientist coined the term 'cells'.
Robert Hooke
What is the second part of cell theory?
The cell is the basic unit of structure and function in living organisms.
Process by which organisms maintain a relatively stable internal environment.
Homeostasis
Produces useable energy for the cell known as ATP.
Mitochondria
Name one organelle that is only found in plant cells and not animal cells.
Chloroplasts or Cell Wall
What is the function of ribosomes?
What is the third part of cell theory?
All cells come from pre-existing cells.
Structure in the nucleus that is made up of protein and DNA.
Chromosome
Large vesicles that store nutrients, waste, or water.
Vacuole
Why do animal cells not have chloroplasts?
They do not use photosynthesis to make food.
Which scientist discovered that all plants have cells?
Matthias Schleiden
A fungus and a plant are both able to produce new cells as they grow. What part of cell theory explains this?
All cells come from pre-existing cells.
The arrangement of parts in an organism.
Structure
Jelly-like substance in which organelles are contained; made up of water, dissolved nutrients, and salts.
Cytoplasm
Vacuole
Name the levels of organization in order from smallest to largest.
Cell, tissue, organ, organ system, organism
White blood cells help fight infections in the human body. What part of cell theory explains this?
The cell is the basic unit of structure and function in living organisms.
The main energy source that cells use for most of their work.
ATP
Location of protein synthesis; can be free-floating or attached to ER making it “rough” ER.
Ribosomes
Why do plant cells have larger vacuoles than animal cells?
They need to store more water and it also helps to give the cell structure and keep the plant upright.
Sweating when it is hot, and shivering when it is cold are examples of maintaining _______________.
homeostasis