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a naturally occurring sequence of organisms from the various trophic levels that feed on each other.
a structure made mostly of glass, in which temperature and humidity can be controlled for the...
(also called the stele) the region that includes the pericycle and the vascular tissues in a...
biochemical process that traps radiant or light energy from the Sun and converts it into glucose...
the part of the atmosphere that contains the ozone layer and is about 10 km above the Earth's...