Answer: -centriole
The cell (from Latin cella meaning “small room”) is the basic structural functional and biological unit of all known organisms.A cell is the smallest unit of life. Cells are often called the “building blocks of life”. The study of cells is called cell biology cellular biology or cytology.. Cells consist of cytoplasm enclosed within a membrane which contains many biomolecules such as …
In biology the cell is the basic structure of organisms.All cells are made by the division of other cells .. The environment outside the cell is separated from the cytoplasm inside the cell by the cell membrane.Inside some cells parts of the cell stay separate from other parts. These separate parts are called organelles (like small organs).They each do different things in the cell .
A prokaryote is a cellular organism that lacks an envelope-enclosed nucleus. The word prokaryote comes from the Greek πρό (pro ‘before’) and κάρυον (karyon ‘nut’ or ‘kernel’). In the two-empire system arising from the work of Édouard Chatton prokaryotes were classified within the empire Prokaryota. But in the three-domain system based upon molecular analysis …
While Robert Hooke’s discovery of cells in 1665 led to the proposal of the Cell Theory Hooke misled the cell membrane theory that all cells contained a hard cell wall since only plant cells could be observed at the time. Microscopists focused on the cell wall for well over 150 years until advances in microscopy were made. In the early 19th century cells were recognized as being …
In cell biology the nucleus (pl. nuclei; from Latin nucleus or nuculeus meaning kernel or seed) is a membrane-bound organelle found in eukaryotic cells .Eukaryotes usually have a single nucleus but a few cell types such as mammalian red blood cells have no nuclei and a few others including osteoclasts have many.The main structures making up the nucleus …