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Ecosystem
a community of different species interacting with one another and the nonliving environment of matter and energy
ecosphere or biosphere
all of the earth's ecosystems together
metabolism
the complete set of chemical reactions that carry out the role of capturing and absorbing energy from an organism's environment
asexual reproduction
the perpetuation of an organism by one parent, occurs by simple celled vision and is common in single celled organisms
sexual reproduction
organisms that produce offspring by combining sex cells or gametes such as ovum and sperm from both parents
evolution
changes in the genetic composition of organisms through time
core
the innermost layer of the earth made of iron and nickel
mantle
thick solid layer surrounding the core
asthenosphere
the "plastic" region of the mantle, not solid portion of the mantle, right under the crust
crust
the outermost and thinnest zone of the earth
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