Questions

Wherever on earth we hold a compass, the needle points towards the magnetic North Pole. A compass is a great tool for navigation.

Compass is widely used in aircrafts, ships, military services,...

The main use of salt in the diet is to produce in small amounts the hydrochloric acid required for the digestion of food.

Green land is the largest of all the Islands.It is a part of North America

To display current date and time in MS Excel, we use Now() method. 

A simile is a figure of speech in which two different things are compared using like or as words.

Here in the given sentence, Foam brightens like the dogwood foam's brightness is compared to dogwood. Hence, it is a simile.

The artificial kidney is the dialysis machine. Blood from the body is fed into the machine which removes nitrogenous wastes like urea and returns the blood back to the body.People with renal failure have to use this machine.

The rungs or the sides of the DNA ladder is made of Deoxyribose, which is a pentose, and a phosphate group are the two molecules together form the two sides of the DNA i.e, A sugar (deoxyribose) and a phosphate.