4th millennium BC. The 4th millennium BC spans the years 4000 through 3000 BC. Some of the major changes in human culture during this time included the beginning of the Bronze Age and the invention of writing, which played a major role in starting recorded history.
Plone is a powerful and flexible, enterprise-quality content management system that is easy for developers to download and install, and easy for end-users to use. Plone lets non-technical people create and maintain website content using only a web browser.
In biology, the term pliody is used to define the number of sets of chromosomes found within the nucleus of a cell. Different organisms have different number of chromosomes. Two types of eukaryote cells are haploid and diploid cells, the main difference being the number of chromosome sets found in the nucleus.