BIOL 1000 Chapter Notes -Nuclear Pore, Ribosomal Rna, Endoplasmic Reticulum
Document Summary
Latin name cellulae, meaning small rooms hence the origin of the biological term cell. Robert brown, an english botanist, noticed a discrete, spherical body inside some cells; he called it a nucleus. Cells arise only from pre-existing cells by a process of division. 2. 1 basic features of cell structure and function. Cells carry out the essential processes of life. Contain highly organized systems of molecules, including the nucleic acids dna and rna, which carry hereditary information and direct the manufacture of cellular molecules. Cells use chemical molecules or light as energy sources for their activities. Cells also respond to changes in their external environment by altering their internal reactions. Cells duplicate and pass on their hereditary information as part of cellular reproduction. Some types of organisms, including almost all bacteria and archaea; some protists, such as amoebas; and some fungi, such as yeasts, are unicellular.
