scientist, discoveries & inventions MCQ section 3 Practice Questions Answers Test with Solutions & More Shortcuts

Answer: (a)

Answer: (b)

Ecology is defined as the study of the patterns and processes governing the abundance and distribution of organisms and their relationships to their environment. It is the science that deals with the inter-relationship between the various organisms living in an area and their relationship with physical environment.

Answer: (b)

Alexander Graham Bell, an eminent Scottish-born scientist, is credited with inventing the first practical telephone in 1876. Among one of his first innovations after the telephone was the “photophone,” a device that enabled sound to be transmitted on a beam of light.

Answer: (b)

Voice-mail (also known as voicemail, voice message or voice bank) is a computer-based system that allows users and subscribers to exchange personal voice messages; to select and deliver voice information; and to process transactions relating to individuals, organizations, products and services, using an ordinary telephone.

Voicemail systems were developed in the late 70’s by Voice Message Exchange (VMX). They became popular in the early 80’s when they were made available on PC-based boards.

Voice mail was the brainchild of Gordon Mathews, a successful entrepreneur who held 35 US and foreign patents at the time of his death on February 23, 2002.

Answer: (b)