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what is biology about?
study of living things and their vital processes.
what is water?
water is water
dependent variable
affect by other factors
independent variable
changed by the experimenter
constant and control
constant - unchanged in the experiment
control - used for comparison
cell theory
living things are made of cells
gene theory
characteristics are transferred from parents to offspring within chromosomes (DNA)
homeostasis
keeping this constant
whats a motel for?
it a representation of part of the real world or something going on in life.
evolution
changes over time
- natural selection - genes passed that are helpful
- adaptation - help in a specific situation
Biosphere
part of Earth where life exists; includes water, land and air
Scientific Theory
broad explanations that are well supported by data
can change over time
Scientific Law
statement that cannot change under certain natural conditions
Ecosystem
abiotic and biotic factors in an area
Biome
similar ecosystems with similar environments
cell
basic unit
tissue
group of some kind of cells
organ
Structure made of one or more tissues
organ system
group of organs that work together
organism
individual with more than one organ system
Population
number of same species in a specific area
what are the characteristics of life?
responds to environment
grows and develops
produces offspring - reproduction
maintains homeostasis - internal stability
complex chemistry
made of cells - basic unit of life
Community
all the populations in the same area
Living Things
Organism - individual living thing
Symbiosis - close relationship between species where at least one of benefits
Competition - relationship between organisms for the same resource
Scientific Method
observation - 5 senses
question - must be testable
hypothesis - possible answer that can be tested
experiment - systematic
analysis - evidence
conclusion - judgement and sharing