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Biology
Bio = life ology = study of Biology = study of life
Biotic factors = ALL LIVING things in an environment
Trees, cats, fish, bacteria, etc.Abiotic factors = ALL NONLIVING things
Air, rocks, water, rivers, etc
Abiotic factors recycled
Matter cannot be created or destroyed
Living things depend on abiotic factors to live
Characteristics of living things
ALL living things MUST HAVE the following characteristics
1. Be complex and organized
2. Use energy (to maintain homeostasis)
3. Grow (and develop)
4. reproduce
5. Respond and adapt
Overview Natural tendency is for universe and matter to move towards
an increasing state of disorder
This involves a LOSS of usable energy40% of energy produced in human metabolism is lost as heat
Organisms have developed a complex/organized system that allowsThem to maintain homeostasis (same state)
System requires energy to do work
Because organisms maintain homeostasis, they are able to grow and reproduce
Successful growth and reproduction depends on an organisms ability to adapt and respond to the environment (immediately and over time
Heirarchy Levels of organization
Atom molecule CELL tissue organ organ system Organism population community ecosystem biosphere
complex and organized
complex and organized
Life captures energy from the sun and converts that energy into NUTRIENTS.(photosynthesis).
NUTRIENTS are broken down and converted into usable ENERGY.(cellular respiration)
ENERGY is used to maintainHOMEOSTASIS.
Nutrients are RECYCLED
Use energy to maintain hom
eostasis
The CELL is the smallest unit that exhibits all the characteristics of living things
Organisms may be single celled (unicellular) or multicellular
complex and organized
ALL organisms contain
Deoxyribonucleic acid (DNA)
UNITY
DNA is inheritedDNA determines the patternof growth and development
complex and organized
While all organism are unified in possessing DNA, differences in DNA arrangement makes all organisms DIFFERENT
DIVERSITY
DNA RNA (transcription)RNA protein (translation
Grow and develop
Reproduce
Organisms are CLASSIFIED in a HEIRARCHYbased on GENETIC (inherited DNA )differences.
Classification and Evolution
The THREE DOMAINS
Because DNA is INHERITED, classification by genetic differences provides evidence for EVOLUTION
Reproduce G
row and developcom
plex and organized
ADAPT and RESPOND
Organisms that are NOT able to ADAPT and RESPONDto a constantly changing environment
WILL NOT SURVIVE
Failure to survive = failure to reproduce
Failure to reproduce = loss of genetic information (DNA)
Adapt and Respond
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