Characteristics of Life

1
Characteristics of Life

• Biology
• The study of Life
• Bio Life
• ology Study of

2
Characteristics of Life

• Response to Stimulus (Movement)
• Growth Development
• Reproduction
• Organization
• Homeostasis
• Use Energy

3
Living things acquire materials and energy, and
they reproduce
4
Response to Stimulus

• Stimulus is any response to an organisms
  environment that causes it to react.

5
Living things grow and develop
6
Growth Development

• All organisms change during their lives
• Growth increases size
• Development is like the stages of life that
  humans go through infant, adolescent,
  (puberty), adult.

7
Reproduction

• The species must reproduce
• This is how the species survives
• A group of organisms that interbreed and produce
  fertile offspring are called a species.

8
Reproduction (cont)

• Reproduction is a process that can allow gradual
  change in the characteristics of a species over
  time.
• Change over time is evolution.
• Change over time explains the great diversity of
  life.

9
Organization

• Each species has its own type of body
  organization
• Cells, tissues, organs, systems are levels of
  organization
• All body systems interact with other systems.

10
Levels of Biological Organization
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Homeostasis

• The ability of the body of an organism to
  maintain its internal environment or conditions
  in the body.
• Example Body Temperature
• Maintaining balance within the body

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Use Energy

• All living things obtain energy from their
  environment.
• They use this energy to move, grow and develop,
  reproduce, have organized body systems, and
  maintain homeostasis.
• Autotrophic vs Heterotrophic

13
Theme of Biology

• Living things do not exist in isolation
• They are all functioning parts in the delicate
  balance of nature.
• Life is dynamic, not static

14
Organization of the Biosphere

• Chemical cycling- chemicals cycle through an
  ecosystem until they are returned to the
  environment through death and decomposition
• Energy cycling-flows from the sun through
  photosynthesizers to others in food chain and
  dissipates back to the environment as heat

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A grassland, a terrestrial ecosystem

• Fig 1.6