Answer
Autotrophic
nutrition is
a type of nutrition in which organisms synthesize the organic materials they
require from inorganic sources. Chief sources of carbon and nitrogen are carbon
dioxide and nitrates, respectively. All green plants are autotrophic and use
light as a source of energy for the synthesis, i.e. they are photoautotrophic.
Some bacteria are also photoautotrophic; others are chemoautotrophic, using
energy derived from chemical processes.
Heterotrophic
nutrition is
a type of nutrition in which energy is derived from the intake and digestion of
organic substances, normally plant or animal tissues. The breakdown products of
digestion are used to synthesize the organic materials required by the organism.
All animals obtain their food this way and they are heterotrophs.
Assignment submitted by S.M., Kang, E.S., Ong, T.W., Tan, K.Y., Ho. X.H., Wong 2011/2012 (IBM)
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