Biology = the study of life

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Biology the study of life
What does it mean to be alive?
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R A R E R

• Regulation (homeostasis/ equilibrium)
• Adaptation
• Reproduction
• Energy acquisition (metabolism)
• Response

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Regulation

• The ability of an organism to maintain an
  environment that is conducive to all other
  biological processes.
• Maintaining homeostasis or balance.

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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
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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.

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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.

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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

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Response

• The ability of a living thing to respond to
  changes inside and outside of its body.