lOMoARcPSD|25572827
BIO 102 Notes
Principles Human Biology (Liberty University)of
lOMoARcPSD|25572827
Human Biology:
August 19, 2019 (Chapter 1)
o
Living vs. not living
o
Living things:
▪
Have a different molecular composition than nonliving things
(carbohydrates, lipids, proteins, nucleic acids).
▪
Require energy and raw materials.
•
Metabolism – all chemical reactions that occur a cell.in
•
Nutrients – function as building blocks (raw materials).
•
Energy – capacity to work.
•
Make new molecules.
▪
Are composed of cells . (unicellular multicellular)or
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Maintain homeostasis.
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Maintain a constant internal environment despite a
constantly changing external environment.
▪
Respond their external environment.to
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Grow and reproduce.
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DNA
o Humans are (multicellular, eukaryotic, Kingdom Animalia
heterotrophic)
. “Homo sapiens”
o
Criteria used for classification
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Presence or absence a nucleusof
▪
Domain bacteria and domain archaea lack a membrane-bound
nucleus (prokaryote).
▪
Domain eukarya has a membrane-bound nucleus (eukaryote).
o
Number of cells
▪
Unicellular
▪
Multicellular
o
Type of metabolism
