Questions

Prokaryotic cells lack a nucleus and do not have an extensive system of interior membranes. They are encased in a cell wall and many contain external structures such as a capsule, flagellum, or pili. Prokaryotes – have a relatively uniform interior that is not subdivided by internal membranes.

The eye can see images separately only if they are exhibited at an interval of more than 1/10 of a second. In the case of a movie, the still pictures come one after the other at less than this minimum interval. So we do not see them separately but only as a continuous moving picture.

The network layer concerns with the packets. It brings the packets from the source to the destination.

The gram formula mass is nothing but molar mass.

Composition :

Symbol      Element       Atomic weight       Atoms
   

     P         Phosphorus       30.973762               1       = 30.973
   

     O         Oxygen             15.9994                  4       =  63.998
   

     N         Nitrogen            14.0067                  3       =  42.020
   

     H         Hydrogen          1.00794                  12      =  12.096

Total   =  30.973+63.998+42.020+12.096 = 149.087

Washing soda is the common name for Sodium Carbonate (Na2CO3). It is also called as Soda Ash.

An operating system has three main functions:

(1) manage the computer's resources, such as the central processing unit, memory, disk drives, and printers,

(2) establish a user interface, and

(3) execute and provide services for applications software.

ROM stands for read-only-memory.

It's used to store the start-up instructions for a computer, also known as the firmware.

Most modern computers use flash-based ROM. It is part of the BIOS chip, which is located on the motherboard.