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Transcript
(CHAPTER 1 / SECTION 1)
LIVING THINGS
AND THE
ENVIRONMENT
Living Things and Their
Environment
• An organism or type of living thing
needs to obtain food, water, shelter and
other things it needs to live, grow, and
reproduce from its environment.
• An environment that provides the things
an organism needs to live is called its
habitat.
Factors in an Environment
Biotic – living parts of the
environment.
Ex. producers and consumers.
Abiotic – nonliving parts of the
environment.
Ex. water, sunlight, oxygen,
temperature, and soil.
Biological Complexity
• Living
organisms can
be studied at
different levels
of complexity.
Biosphere
Biome
Ecosystem
Community
Population
Individual
Populations
A species is a group of
organisms that are similar and
can reproduce with each other.
A population is a group of
Migrating wildebeest population
organisms from the same
species occupying in the same
geographical area.
This area may be difficult to
define. Why?
Tiger populations comprise
widely separated individuals
Communities and Ecosystems
• A community is all the populations that live
together in an area.
• An ecosystem is the community of organisms
that live in a particular area along with their
nonliving surroundings.
* The community and the abiotic factors
together form an ecosystem.
Ecology
• The study of how living things interact
with each other and their environment.