metabolism
192
acceptor can be oxygen, nitrate, iron, manganese, sulfate or carbon dioxide.
In this way various aerobic and anaerobic respiration principles are possible.
There are also different types of fermentations in the group of heterotrophic
anaerobic organisms.
metabolism all the biochemical reactions in a cell or organism. Such reactions
involve three major phases: first, the breaking down of organic compounds
into smaller fragments (catabolism or destructive metabolism); second, the
reactions of the intermediary metabolism; third, the reactions of the synthesis of building blocks and polymers for the composition of the various
cell structures. These synthesizing reactions (constructive processes) are
called anabolism. The metabolism of all the enzymatic reactions in a wide
variety of living organisms have much in common. There is a fundamental
similarity in carbohydrate, lipid and amino acid metabolism, which gave rise
of the dogma of the unity in biochemistry. On the other hand there is a wide
diversity of reactions (~metabolic diversity), but they are not so diverse as they
may first appear.
metameric repetition of a pattern of elements belonging to each of the main
organ systems of the body, along the length axis of the body, or a comparative repetition along the axis of an appendage. Example: Polychaeta.
metamorphic water ~juvenile water.
Metazoa multicellular animals in which there is at least some degree of cell differentiation. Include all taxa of the animal kingdom. The unicellular Protozoa,
which formerly were included in the animal kingdom, are now assigned to
the kingdom Protoctista.
Meteor Expedition (1925-1927) this German expedition marks the beginning of
a new interest in oceanography which had strongly diminished after the
heyday of expeditions around 1900. It sampled 14 sections across the
Atlantic Ocean from 20° N to 65° S. Stations were closely spaced and subsurface observations made at standard depths down to the sea bottom. The
central topic was deep-sea circulation and mixing processes in the entire
Atlantic Ocean and led to G. Wiist's circulation model. For the first time the
echosounder (~seismic instruments) was used, revealing a surprisingly irregu1ar deep-sea bottom in all cross-sections. Due to the relatively sparse
(because time-consuming) wire soundings of previous expeditions, the sea
bottom was presumed to be far more uniform than it actually proved to be.
meteoric water ~juvenile water.
192
acceptor can be oxygen, nitrate, iron, manganese, sulfate or carbon dioxide.
In this way various aerobic and anaerobic respiration principles are possible.
There are also different types of fermentations in the group of heterotrophic
anaerobic organisms.
metabolism all the biochemical reactions in a cell or organism. Such reactions
involve three major phases: first, the breaking down of organic compounds
into smaller fragments (catabolism or destructive metabolism); second, the
reactions of the intermediary metabolism; third, the reactions of the synthesis of building blocks and polymers for the composition of the various
cell structures. These synthesizing reactions (constructive processes) are
called anabolism. The metabolism of all the enzymatic reactions in a wide
variety of living organisms have much in common. There is a fundamental
similarity in carbohydrate, lipid and amino acid metabolism, which gave rise
of the dogma of the unity in biochemistry. On the other hand there is a wide
diversity of reactions (~metabolic diversity), but they are not so diverse as they
may first appear.
metameric repetition of a pattern of elements belonging to each of the main
organ systems of the body, along the length axis of the body, or a comparative repetition along the axis of an appendage. Example: Polychaeta.
metamorphic water ~juvenile water.
Metazoa multicellular animals in which there is at least some degree of cell differentiation. Include all taxa of the animal kingdom. The unicellular Protozoa,
which formerly were included in the animal kingdom, are now assigned to
the kingdom Protoctista.
Meteor Expedition (1925-1927) this German expedition marks the beginning of
a new interest in oceanography which had strongly diminished after the
heyday of expeditions around 1900. It sampled 14 sections across the
Atlantic Ocean from 20° N to 65° S. Stations were closely spaced and subsurface observations made at standard depths down to the sea bottom. The
central topic was deep-sea circulation and mixing processes in the entire
Atlantic Ocean and led to G. Wiist's circulation model. For the first time the
echosounder (~seismic instruments) was used, revealing a surprisingly irregu1ar deep-sea bottom in all cross-sections. Due to the relatively sparse
(because time-consuming) wire soundings of previous expeditions, the sea
bottom was presumed to be far more uniform than it actually proved to be.
meteoric water ~juvenile water.