1 Flashcards
What is a cell?
The basic microscopic unit of all living beings; cell produces energy and uses it to build all the substances necessary for its life.
What is an organ
a fully differentiated structural and functional unit in an animal that is specialized for some particular function
What are tissues
cells that aggregate to form a specific function
Avg person has how many cells in body?
100 trillion
How are cells differentiated? Examples
By structure and fxn
- Morphologically cells vary in shape and size
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What is cytology
the study of cellular structure, mainly through the use of microscopy
What is the cell theory
- all organisms consist of one or more cells
- The cell is the basic unit of structure for all organisms
- All cells arise only from preexisting cells
How did visualizing cells become possible
following the invention of the light microscope (1665)
Whats a cell’s genome?
the entire genetic information in its DNA
What is evolution
Genetic changes and selection
What is the basic unit of biology
The cell
