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.
Organelles are specialized membrane-enclosed structures in the cytoplasm of eukaryotic cells. The nucleus, which contains DNA in the form of chromosomes, is the most characteristic eukaryotic organelle.The nuclear envelope is connected to a system of membranes in the; cytoplasm called the endoplasmic reticulum (ER).rganelles are specialized membrane-enclosed structures in the cytoplasm of eukaryotic cells. The nucleus, which contains DNA in the form of chromosomes, is the most characteristic eukaryotic organelle.