continue to exist, and a part of them develop into higher organisms,
including man. The key of this process lie in the cell specialization and
differentiation.
The second problem is related with the cloning. Until recently, only
sexual cells were considered capable to reproduce multicellular
organism. Using the cloning methods proved that individual somatic cells
can regenerate a whole multicellular organism. This shows, that these
cells contain hereditary information not only about their individual
development and reproduction, but also the information acquired in the
course of evolution, i.e. about the organism as a whole. Although cloning
is not yet realized in all kinds of multicellular organisms (mainly animal),
undoubtedly this circle will extend. It will be the next great discovery in
biology — when it will be proven that it is a norm, not exception. Then
biology will be even more advanced science and will answer many
questions.