Questions

The first computers used vacuum tubes for circuitry and magnetic drums for memory, and were often enormous, taking up entire rooms.

The Egyptian scripts is known as Hieroglyphic which means 'sacred writing' . It consisted of 24 signs, each of which stood for a single consonant. Vowels were not written. Later the Egyptian started using symbols for ideas and the total number of signs rose to about 500. The writers, who constituted an important section of society , wrote with reed pens on the leaves of a plant called 'Papyrus' from which we get the word 'paper'.

Alternative (a) refers to a delta

A faint ring encircles Jupiter. Neptune and Uranus are also reported to show some sort of ring.

In Britain few of the Canals built during the early days of the Industrial Revolution are now playing an important role in the economy  of the country. Example, Grand Union Canal.

An omnivore is an animal that eats food from both plants and animals.

Animals that eat other animals are called carnivores. Carnivores that eat herbivores are called secondary consumers, and carnivores that eat other carnivores are called tertiary consumers.