The name Tcl is derived from Tool Command Language and is pronounced tickle. Tcl is a radically simple open-source interpreted programming language that provides common facilities such as variables, procedures, and control structures as well as many useful features that are not found in any other major language.n most Linux systems, Tcl/Tk is already installed. You can find out by typing tclsh at a console prompt (xterm or such). If a % prompt appears, you're already set. Just to make sure, type info pa at the % prompt to see the patchlevel (e.g. 8.4.9) and info na to see where the executable is located in the file system.
Because its nervous system is similar to that of grasshoppers and ants, lobsters are sometimes called bugs.. When food is scarce, lobsters can turn cannibal and dine on smaller lobsters. Lobsters reproduce by laying lobster eggs.
Some female cockatiels also lay eggs without fertilization, much as those of the chicken species used for food production. A cockatiel is getting ready to lay eggs when she makes her mating call, short chirps repeated rapidly. The bird will also get low to the ground, slightly spread her wings, and bounce as she chirps. Once the cockatiel has laid her eggs she will believe the egg holds a bird, therefore she will sit on it and protect it for about a week. Even the most even-tempered hen will attack to protect her egg. After about a week the cockatiel will realize the egg is empty and stop sitting on it.