Transcript What is Biology?

What are the Characteristics
of living things?
Biology is the study of life.
Biotic—
something alive
Abiotic—something
not alive
Which of the following are biotic
and abiotic?
What does it mean to be living?
Vs.
Characteristics of Living Things
GROWTH &
DEVELOPMENT
movement
CELLS
Energy Use & Respiration
Response to
RegulationStimuli
Homeostasis
Evolution
reproduction
All living things are made of cells
• Review—the cell
theory
• Cells are the basic
unit of life.
• Cells produce other
cells.
All living things grow.
Grow-get bigger
Develop—become
sexually mature
All living things maintain homeostasis by the
process of regulation.
Homeostasis—maintaining a
stable internal balance
All living things respond to stimuli-or
have sensitivity
Responding to stimuli is a
behavior. Populations respond to
stimuli over time by evolving.
All organisms must get nutrition
& use energy.
This can be done by
converting chemicals
(bacteria) or the sun’s
energy into food
(plants). Other
organisms eat to gain
energy. Energy is used
to perform the
characteristics of life.
All living things reproduce.
Reproduction means to pass on DNA
or genetic characteristics.
All living things evolve.
Populations must be able to change
over time as environments change, or
risk becoming extinct. This is done by a
process called natural selection, where
the organisms with the best traits (or
adaptations)survive to reproduce,
passing those traits onto their offspring.
All living things have Internal or
External Movement
An action by an organism or part of
an organism causing a change of
position or place.
All living things are organized.
atoms
molecules
cells
tissues
organs
organ systems
organism
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Evolution
Nutrition