Bio ch. 1 Flashcards
Biology
the study of living things
organism
any living thing
10 characteristics that all living things share
organization, reproduction, heredity, growth + development, metabolism, respond to the environment, homeostasis, interdependence, evolution, excretion
organization
all living things are made up of cells
cell
basic unit of life
organization of life from the smallest to biggest
- atom
- molecule
- cell
- tissue
- organ
- organ system
- organism
reproduction
organisms make more of themselves
Asexual reproduction
DNA from one organism (1 parent)
Sexual reproduction
DNA from 2 organisms (2 parents)
What kinds of reproduction do humans undergo?
Asexual & Sexual reproduction
Heredity
the passing of traits to offspring
gene
basic unit of heredity
DNA
carries the instructions
Mutation
a change in DNA (hereditary vs. Sporadic)
examples of genetic mutations
green eyes, red hair, and cancer
growth and development
to get bigger
(growth and development )
unicellular examples
bacteria and ameba
(growth and development)
multicellular examples
humans
metabloism
obtaining and using energy from the sun
how does metabolism work
with a combination of chemical reactions to carry out life’s processes
stimulus
signal in which an organism responds
response to environment example
ex. bright light will make you squint, cold weather will make you shiver
(Respond the the environment)
phototropism
plants bend toward the sun
homeostasis
maintaining a stable internal environment while the outside changes
homeostasis ex:
temperature and water content …
will be maintained through internal stimuli
interdependence
how organisms live and interact with each other and their environment
ecology
the study of interdependence
evolution
change of a species over time
natural selection
“survival of the fittest”
excretion
removal of wastes
no living things can have …
characteristics of living things
