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.
Eukaryotic cells are those cells, which are complex and larger than the prokaryotic cells. The term eukaryote is derived from the Greek word- aâ¬Ã¢â¬ oeeukaryotea ÅeukaryoteÃ¢ meaning true or. Good nuclei this cell includes all life kingdoms. except monerahe prokaryotic cells do not have membrane bound cellular organelles. The cellular structure of the prokaryotes and eukaryotes differ in the presence of c ellular structures like the mitochondria and chloroplasts, cell wall and the structure of chromosomal DNA.