Transcript Slide 1

Living
vs.
Non-living
Characteristics of Life:
1. Living things are made up of
cells
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Cell: Basic unit of life
Unicellular: organism made up of one cell
ex. amoeba
Multicellular: organism made up of more
than one cell
ex. human
2. Living things reproduce.
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Sexual reproduction: 2 cells from 2
different parents to produce the first cell
of a new individual
Asexual Reproduction: New organism has
single parent
3. Living things are based on a
universal genetic code.
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DNA:
deoxyribonucleic acid.
Traits are inherited from parents.
4. Living things grow and
develop.
5. Living things obtain and use
materials and energy.
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Metabolism:
chemical reactions that builds up or breaks
down materials as an organism carries on
life processes.
6. Living things respond to their
environment.
7. Living things maintain a stable
internal environment.
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Homeostasis: process of keeping internal
conditions stable
8. Taken as a group, living things
change over time.
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Evolution:
Changes that occur in an organism over a
long period of time, several generations.
Biology
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BIO- = life
- logy = study of
Ecology
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ECO- = environment/ecosystem
-logy = study of
Zoology
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Zoo- = animal
-logy = Study of
Paleontology
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Paleo- = past
-logy = the study of
Levels
of
Organization
Molecules
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Groups of atoms
Smallest unit of most chemical compounds
Cells
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Smallest functional unit of life
Groups of Cells
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Tissues
Organs
Organ system
Organism
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Individual living thing
Population
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Group of organisms of one type that live
in the same area
Community
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Populations that live together in a defined
area
Ecosystem
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Community and its non-living surroundings
Biosphere

The part of the earth that contains all
ecosystems