|How did bacteria develop on Earth?
|Question Date: 1999-05-27|
I am not up on the evolution of bacteria but I
think your student can find answers to the
question at the following web
you need more help let me know.
It is believed that bacteria came from very basic
organic molecules that were fused together by
lightning.These then came together until proteins
then enzymes then whole bacteria developed.
This is a difficult question that is hard to
answer because we can't go back to early history
to find out. It is generally thought that to make
the molecules necessary to form cells (bacteria
are cells), there are several essential
1) The right
2) Energy to make new molecules
A stable environment that won't break up complex
Scientists have several
theories on where and how life might have
developed. It is generally agreed that the right
chemistry and stable conditions only would have
occurred in water such as oceans or lakes. One
major theory is that life formed in shallow bodies
of water where solar radiation and possibly
lightning provided the energy for new combinations
of molecules to form. Another more recent theory
is that life formed at thermal vents at the bottom
of the ocean where magma near the surface heats
water and provides lots of minerals for the
formation of molecules and eventually cells. Can
you think of parts of the world where these
conditions might exist?
Click Here to return to the search form.