Diversity of life, levels of organization of living beings.

For the study of life, is part of the traditional classification of the two large groups: the animal kingdom and plant kingdom. But going into details and detailed studies, are beings who share certain characteristics of both kingdoms.

In this the reason why many biologists believe more desirable to state four kingdoms:


1. Moneras or Prokaryotes: Formed by bacteria and blue algae. According to Whittaker, along with bacteria are the kingdom azuladosas algae or blue-green algae, and are prokaryotes.

• Are unicellular or colonial.
• With chlorophyll but not chloroplast.
• Fresh or salt water, there ADAF.
• Of autotrophic nutrition. Fix atmospheric nitrogen.
• They reproduce by fission.

2. Unicellular eukaryotic organism: protozoa, yeasts and unicellular algae.

3. Metafitas: Multicellular plants.

4. Metazoans: Multicellular animals.