Some need oxygen, other do not
The word metabolism refers to those biochemical reactions that are vital for life and continuously occur inside the cells of each living being. Some of these reactions can only occur if there is oxygen. Some others, instead, do not need it. Aerobic bacteria are those bacteria that, like animals, “breathe oxygen”. Anaerobic bacteria are those bacteria that can live in an environment without this gas.
Bacterial reproduction is asexual: it occurs by fission and not through the exchange of genetic material between two individuals of a different sex. Each bacterial cell divides itself to originate two identical cells that, in their turn, divide themselves into two other identical cells, and so on. A single cell is able to generate, in a short time, colonies of bacteria that are be made up of millions of cells.
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27 September 2012
Over 7 billion people on Earth
Demographers have estimated that on 31 October 2011 world population...
15 September 2021
Can you be intelligent without a brain?
Can you be intelligent without a brain? The answer is "in a certain sense, yes" and this is demonstrated by…
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26 July 2021
Japanese beetles and other alien species
There is a beetle that has been invading the Italian countryside and cities for some time now, a small insect…
16 June 2021
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World Sea Turtle Day is held on 16 June. First established in 2008, the day is now supported by Sea…
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27 September 2012
Over 7 billion people on Earth
Demographers have estimated that on 31 October 2011 world population...
From the Multimedia section
Facts
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Bio-luminescence
Many sea animals, including a lot of fish and molluscs that live in the dark in the ocean depths...
Down-pouring bacteria
It sounds incredible, but recent researches have found that bacteria can cause some atmospheric phenomena...
-
Bacteria as Sherlock Holmes
A drop of blood, a fragment of skin or a hair found on the scene of a crime can supply…
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Who lives well with low oxygen?
<i><span style="font-style: normal; " class="Apple-style-span"><i><em>Aquandriella fermentas</em> </i>lives in stagnant waters and can stand complete anaerobiosis...</span></i>
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13 May 2011
Bio-luminescence
Many sea animals, including a lot of fish and molluscs that live in the dark in the ocean depths...
-
Down-pouring bacteria
It sounds incredible, but recent researches have found that bacteria can cause some atmospheric phenomena...
-
Bacteria as Sherlock Holmes
A drop of blood, a fragment of skin or a hair found on the scene of a crime can supply…
-
Bio-luminescence
Many sea animals, including a lot of fish and molluscs that live in the dark in the ocean depths...
-
Down-pouring bacteria
It sounds incredible, but recent researches have found that bacteria can cause some atmospheric phenomena...