Characteristics of Life
The basic unit of structure and function of all living things.
A cell
A cell can grow, respond to stimuli and do this to make new cells.
Reproduce (divide)
A change in the environment that causes an organism to respond.
A stimulus
This major factor determines the temperature of a planet.
Its distance from its star (the Sun)
The three domains of life.
Bacteria, Archaea and Eukarya
Living things maintain this kind of balance.
Homeostasis
Reproduction that involves two parents.
Sexual reproduction
Keeping a stable internal environment even when the outside changes.
Homeostasis
Life needs this kind of medium so molecules can move and react.
A liquid medium (such as water)
The kingdom/domain that holds the extremophiles.
Archaea (Archaebacteria)
A species or an individual: which one evolves?
A species (a population over time)
Reproduction with one parent that produces identical offspring.
Asexual reproduction
When the skin gets too hot, this evaporating liquid removes heat.
Sweat
Earth's two energy sources.
Sunlight and geothermal energy (heat from Earth's interior)
The four kingdoms in the domain Eukarya.
Protista, Fungi, Plantae and Animalia
Living things take in and use this to grow, reproduce and carry out life processes.
Energy
The process by which cells become specialized for a specific job.
Differentiation
When the body gets too cold, this action generates heat.
Shivering
Name one function of an atmosphere.
Blocks harmful radiation, traps heat, or provides gases
All organisms in Eukarya share this characteristic.
Their cells have a nucleus
Name any four of the eight characteristics of life.
Made of cells; organized; use energy; respond to stimuli; grow and develop; reproduce; maintain homeostasis; evolve
Compare the offspring: how are the offspring of sexual and asexual reproduction different from the parent?
Sexual: genetically different from the parents. Asexual: genetically identical to the parent
The body temperature loop is labeled this type of feedback on the diagram.
Negative feedback
Tectonic activity is essential for life because it does this.
Recycles nutrients and carbon, which regulates climate
Single-celled organisms that live in extreme heat, salt or acid have no nucleus. Name their domain.
Archaea (Archaebacteria)