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Marine Prokaryotes
Marine prokaryotes are marine bacteria and marine archaea. They are defined by their habitat as prokaryotes that live in marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. All cellular life forms can be divided into prokaryotes and eukaryotes. Eukaryotes are organisms whose cells have a nucleus enclosed within membranes, whereas prokaryotes are the organisms that do not have a nucleus enclosed within a membrane. The three-domain system of classifying life adds another division: the prokaryotes are divided into two domains of life, the microscopic bacteria and the microscopic archaea, while everything else, the eukaryotes, become the third domain. Prokaryotes play important roles in ecosystems as decomposers recycling nutrients. Some prokaryotes are pathogenic, causing disease and even death in plants and animals. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clickable
Point and click are the actions of a computer user moving a pointer to a certain location on a screen (''pointing'') and then pressing a button on a mouse, usually the left button (''click''), or other pointing device. An example of point and click is in hypermedia, where users click on hyperlinks to navigate from document to document. Point and click can be used with any number of input devices varying from mouses, touch pads, trackpoint, joysticks, scroll buttons, and roller balls. User interfaces, for example graphical user interfaces, are sometimes described as "point-and-click interfaces", often to suggest that they are very easy to use, requiring that the user simply point to indicate their wishes. These interfaces are sometimes referred to condescendingly (e.g., by Unix users) as "click-and-drool" or "point-and-drool" interfaces. The use of this phrase to describe software implies that the interface can be controlled solely through the mouse (or some other means such ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
