Royal jelly, a thick, milky substance secreted by young nurse honeybees to feed a bee colonyâs larvae, most notably the queen larvae, is a rich source of nutrients, as well as acetycholine, a neurotransmitter that plays a critical role in cognitive function.
The origin of the eukaryotic cell is a milestone in the evolution of life, since eukaryotes include all complex cells and almost all multicellular organisms. The timing of this series of events is hard to determine; Knoll (2006) suggests they developed approximately 1.6â2.1 billion years ago.
Features of Eukaryotic Cells: A eukaryote is an organism that is made up of one or more eukaryotic cells. Some live a single cells and others are multicellular organisms. All multicellular organisms are made up of eukaryotic cells . Because of their complex organization, eukaryotic cells can carry out more specialized functions than prokaryotic cells can.