QUES: Earthworms are Oligochaetes that support terrestrial food chains both as prey and in some regions are important in aeration and enriching of soil. The burrowing of marine polychaetes, which may constitute up to a third of all species in near-shore environments, encourages the development of ecosystems by enabling water and oxygen to penetrate the sea floor. In addition to improving soil fertility, annelids serve humans as food and as bait. Scientists observe annelids to monitor the quality of marine and fresh water. Although blood-letting is no longer in favor with doctors, some leech species are regarded as endangered species because they have been over-harvested for this purpose in the last few centuries. Ragworms' jaws are now being studied by engineers as they offer an exceptional combination of lightness and strength.
What annelids' ears are being studied by engineers?

ANS: unanswerable

QUES: Except for the five species of monotremes (egg-laying mammals), all modern mammals give birth to live young. Most mammals, including the six most species-rich orders, belong to the placental group. The three largest orders in numbers, are first Rodentia: mice, rats, porcupines, beavers, capybaras, and other gnawing mammals; then Chiroptera: bats; and then Soricomorpha: shrews, moles and solenodons. The next three orders, depending on the biological classification scheme used, are the Primates including the humans; the Cetartiodactyla including the whales and the even-toed hoofed mammals; and the Carnivora, that is, cats, dogs, weasels, bears, seals, and their relatives.
What do all modern monotremes give birth to?

ANS: unanswerable

QUES: In the late 14th century, the Songhai gradually gained independence from the Mali Empire and expanded, ultimately subsuming the entire eastern portion of the Mali Empire. The Songhai Empire's eventual collapse was largely the result of a Moroccan invasion in 1591, under the command of Judar Pasha. The fall of the Songhai Empire marked the end of the region's role as a trading crossroads. Following the establishment of sea routes by the European powers, the trans-Saharan trade routes lost significance.
What type of trading routes did Europeans make that compounded to the profound effect?

ANS: establishment of sea routes

QUES: After its defeat in the 1979 general election the Labour Party underwent a period of internal rivalry between the left represented by Tony Benn, and the right represented by Denis Healey. The election of Michael Foot as leader in 1980, and the leftist policies he espoused, such as unilateral nuclear disarmament, leaving the European Economic Community (EEC) and NATO, closer governmental influence in the banking system, the creation of a national minimum wage and a ban on fox hunting led in 1981 to four former cabinet ministers from the right of the Labour Party (Shirley Williams, William Rodgers, Roy Jenkins and David Owen) forming the Social Democratic Party. Benn was only narrowly defeated by Healey in a bitterly fought deputy leadership election in 1981 after the introduction of an electoral college intended to widen the voting franchise to elect the leader and their deputy. By 1982, the National Executive Committee had concluded that the entryist Militant tendency group were in contravention of the party's constitution. The Militant newspaper's five member editorial board were expelled on 22 February 1983.
What did four members of the Labour Party leave to creat?

ANS:
Social Democratic Party