Category 1
The smallest unit of life
Cell
Living things that are made of only one cell
Unicellular
When an organism grows, it increases in
Size
Some organisms must have a _______ to reproduce
Mate
The _______ that most organisms use originally came to Earth from the Sun
Energy
The characteristics of life include: Organization, Growth and Development, Respond to Stimuli, Reproduction, Maintain Homeostasis, and
Use Energy
Living things that are made of two or more cells
Multicellular
Give two examples of internal stimuli
Hunger, Thirst
Give two examples of external stimuli
Things that have all the characteristics of life
Organisms
An organism's ability to maintain steady internal conditions when outside conditions change
Homeostasis
______ placed organisms into two groups--plants and animals
Aristotle
________, a Swedish physician and botanist, placed organisms into two groups called kingdoms
Carolus Linnaeus
The kingdoms include: Bacteria, Archaea, _________, Fungi, Plantae, and Animalia
Protista
Organisms are classified into one of the _____ domains
A group of organisms that have similar traits and are able to produce fertile offspring
Species
________ gives each organism a two-word scientific name
Binomial Nomenclature
A group of similar species is a
Genus
In binomial nomenclature, the _______ word is the organism's genus
First
A series of descriptions arranged in pairs that leads the user to the identification of an unknown organism
Dichotomous Key
A branched diagram that shows the relationships among organisms, including common ancestors
Cladogram
_______ and ________ developed and used the first microscope
Robert Hooke & Anton van Leeuwenhoek
Use light and lenses to enlarge an image of an object
Light Microscope
A light microscope that uses more than one lens to magnify obejcts
Compound Microscope
Uses a magnetic field to focus a beam of electrons through an object or onto an object's surface
Electron Microscope