Intro Notes

STUDY
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Terms in this set (...)

Biology
The science of life or study of living things
Characteristics of Living Things:
Organization, Ability to Reproduce, Growth and Development, Energy and Utilization, Evolutionary Adaption, Response to Stimuli
Homeostasis:
The maintenance of constant internal conditions despite external fluctuations. This is done using chemical messengers (i.e. hormones). Failure to maintain homeostasis leads to: Diseased State, Death
Why is the maintenance of homeostasis important to all organisms?
Body functions, metabolism
Some human examples of conditions maintained by homeostasis are:
Sweating, Shivering, Goosebumps
Three Major Groups of Living Organisms (Domains)
Bacteria, Archaea, Eukarya
The Classification of Living Things
1) Number of cells. Unicellular-bacteria. Multicellular-everything else. 2)Cell Structure, Prokaryotic-no nucleus, Eukaryotic-nucleus. 3)How food is obtained. Ingested-humans. Made-plants. Absorbed-bacteria.
Similarities despite diversity: 1) All organisms are made of cells. 2)All cells have similar molecules (humans are made of carbon) 3)All cells undergo similar chemical reactions. 4)All cells use same genetic material (DNA)
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How can the similarities between organisms as well as diversity be explained?
Mutations
Domain Eukarya:
Kingdom Plantae, Kingdom Animalia, Kingdom Fungi, Kingdom Protista
Where do you think viruses fit into these classification schemes?
Yes: Has genetic material (DNA/RNA), Can evolve, Classified similarly No: Doesn't metabolize, Doesn't respond to stimuli, Doesn't reproduce on its own
Organization of Living Things
Atoms, Molecules, Organelles, Cells, Tissues, Organs, Organism, Population, Community, Ecosystem
Population
Same species that live together
Community
Different populations that live together
Ecosystem
Community + Nonliving things
The Scientific Method
A set of principles that govern how science should theoretically be done.
Steps to the Scientific Method:
1)Make observations. 2)Formulate a hypothesis. 3)Devise a testable prediction. 4)Conduct a critical experiment. 5)Draw conclusions and make revisions.