4. Has a rigid cell wall made of peptidoglycan (except for the mycoplasma). This cell wall is thick in Gram-positive bacteria and thin in Gram-negative bacteria. It is the thickness of the peptidoglycan that accounts for the ability/lack of ability to retain the crystal violet used in the Gram stain.
Computer hardware is the physical parts or components of a computer, such as the monitor, mouse, keyboard, computer data storage, hard disk drive (HDD), graphic cards, sound cards, memory, motherboard, and so on, all of which are physical objects that are tangible.
These parts you can see and touch while sitting at a personal computer. They fall under the category called Hardware. In order to start learning about how to use computers, you will need to be able to identify the main parts that make up a computer. In this lesson, weâll cover the basics of computer hardware. What are these parts on my desk? Some of the following components may be similar to what you have seen while seated at a personal computer. Mouse