Organization, Ability to Reproduce, Growth and Development, Energy and Utilization, Evolutionary Adaption, Response to Stimuli
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)
How can the similarities between organisms as well as diversity be explained?