what makes something alive? the 8 characteristics of living things
Post on 20-Jan-2018
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What Makes What Makes Something Something Alive?Alive?
The 8 characteristics of The 8 characteristics of living thingsliving things
1. Cells1. Cells All living things contain cellsAll living things contain cells Organisms can be:Organisms can be:
UniUnicellular – 1 cellcellular – 1 cell MultiMulticellular – many cellscellular – many cells
Living things are highly Living things are highly organized:organized:
Cells Cells Tissue Tissue Organ Organ Organ system Organ system OrganismOrganism
2. Reproduction2. Reproduction All living things can All living things can
reproduce to make more of reproduce to make more of their speciestheir species
Two types of reproduction:Two types of reproduction: Sexual reproduction – 2 Sexual reproduction – 2
parentsparents Asexual reproduction – 1 Asexual reproduction – 1
parentparent
3. DNA3. DNA All living things contain All living things contain
genetic material that they genetic material that they pass on to their offspringpass on to their offspring
This is why children often This is why children often look like their parents!look like their parents!
4. Growth4. Growth
All living things grow and develop throughout All living things grow and develop throughout their lifetheir life
5. Energy5. Energy All living things need energy in order to surviveAll living things need energy in order to survive Two ways to get energy:Two ways to get energy:
Plants make it themselves (Plants make it themselves (autoautotrophic)trophic) Animals get it from the food they eat Animals get it from the food they eat
((heteroheterotrophic)trophic)
6. Response to 6. Response to Environment/StimuliEnvironment/Stimuli
Living things respond to Living things respond to changes in their environmentchanges in their environment
Unlike adaptations, these Unlike adaptations, these changes are immediate and changes are immediate and take place in an individual take place in an individual organismorganism
Examples:Examples: Blinking, flinchingBlinking, flinching Plants growing towards Plants growing towards
sunlightsunlight
7. Homeostasis7. Homeostasis Living things must maintain Living things must maintain
an internal balance in order an internal balance in order to surviveto survive
Some examples are:Some examples are: Shivering to heat upShivering to heat up Increasing heart rate Increasing heart rate
when runningwhen running Thirst response when Thirst response when
dehydrateddehydrated
8. Adaptation to Change8. Adaptation to Change Living things change over timeLiving things change over time This usually takes many This usually takes many
generationsgenerations Adaptations take place in Adaptations take place in
groups of organisms, not groups of organisms, not individualsindividuals
Examples:Examples: Plants that are adapted to Plants that are adapted to
live in the desertlive in the desert Drug resistant bacteriaDrug resistant bacteria
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