Answer to Question 1
B
Answer to Question 2
Linux is an inexpensive and robust open-source relative of Unix. Unix and Linux constitute the backbone of corporate infrastructure throughout much of the world because they are scalable, reliable, and much less expensive than mainframe operating systems. They can also run on many different types of processors. The major providers of Unix operating systems are IBM, HP, and Sun with slightly different and partially incompatible versions.
Although Windows continues to dominate the client marketplace, many corporations have begun to explore Linux as a low-cost desktop operating system provided by commercial vendors such as RedHat Linux and Linux-based desktop productivity suites such as Sun's StarOffice. Linux is also available in free versions downloadable from the Internet as open-source software. The rise of open-source software, particularly Linux and the applications it supports at the client and server level, has profound implications for corporate software platforms: cost, reduction, reliability and resilience, and integration, because Linux works on all the major hardware platforms from mainframes to servers to clients. Linux has the potential to break Microsoft's monopoly on the desktop. Sun's StarOffice has an inexpensive Linux-based version that competes with Microsoft's Office productivity suite.
Answer to Question 3
C
The structure of skin (a) and epidermis (b) at the microscopic level.
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Mechanisms of pain at the nociceptor level.
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