Transcript Biology = the study of life

Biology = the
study of life
What does
it mean to
be alive?
RARER
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Regulation (homeostasis/ equilibrium)
Adaptation
Reproduction
Energy acquisition (metabolism)
Response
Regulation
• The ability of an organism to maintain an
environment that is conducive to all other
biological processes.
• Maintaining homeostasis or balance.
Why are you thirsty~
An example of regulation an homeostasis
Decreased H2O in plasma
(fluid in blood and surrounding cells)
Decreases volume of fluids in
circulatory system
Stimulates release of Anti-Diuretic Hormone
(ADH) by brain
Stimulates kidneys to
pass less water in urine.
(H2O retention)
Stimulates sensation
of thirst (urge to drink)
Increases volume of fluids in
circulatory system
Stops release of (ADH) by brain
Urge to drink H2O is gone
Adaptation
• The ultimate result of
evolution.
• The traits of a
common group of
living things that
contribute to their
biological success in
a given environment.
Reproduction
• The ability of living things to make more of
themselves through the passage of
genetic material.
• Asexual = one parent genetically
identical offspring
• Sexual = two parents offspring that are a
blend of the parents genetic material and
traits.
Energy & Nutrient Use
(metabolism)
• Energy acquisition:
– Autotroph “Self feeder.” Obtains energy through
photosynthesis.
– Heterotroph “Other eater.” Obtains energy by
taking in materials that contain energy.
• Nutrient use:
– Incorporation of nutrients into the chemical process
necessary for sustaining life.
– Release wastes generated
• Metabolism:
– The sum of all of the chemical processes needed
to sustain the life of an organism
Response
• The ability of a living thing to respond to
changes inside and outside of its body.