Bumblebees of the subgenus Psithyrus (known as 'cuckoo bumblebees', and formerly considered a separate genus) are brood parasites, sometimes called kleptoparasites, in the colonies of other bumblebees, and have lost the ability to collect pollen.
A eukaryotic cell is any cell with a true nucleus and organelles. The nucleus contains the majority of the cellâs DNA and is the genetic hub of the cell. Organelles are membrane bound structures found inside eukaryotic cells and they play a similar role to the organs of the body.Organelles perform certain roles to help the cell function more efficiently.he organelles and nucleus float in the cytoplasm of a cell. Ribosomes â produce proteins. Ribosomes are not true organelles because they are not enclosed in a membrane. Ribosomes can also be found in prokaryotic cells.
The following short list of key features of eukaryotic cells can be used to describe eukaryotic cells without much reference to prokaryotic cells. 1  Contain membranous and non-membranous organelles that have specific functions within the cell. For example, all eukaryotic cells have (or had*1) a nucleus. Different eukaryotic cells contain different types and quantities of other organelles depending on the type and function of the particular cell e.g. many plant cells contain chloroplasts which are the sites of photosynthesis within those cells.