Questions

Sodium carbonate crystal lose water molecules this property is called

Read the passage carefully and choose the best answer to each question out of the four alternatives.

Genetic variation is the cornerstone of evolution, without which there can be no natural selection, and so a low genetic diversity decreases the ability of a species to survive and reproduce, explains lead author Yoshan Moodley, Professor at the Department of Zoology, University of Venda in South Africa.

Two centuries ago, the black rhinoceros – which roamed much of sub Saharan Africa – had 64 different genetic lineages; but today only 20 of these lineages remain, says the paper. The species is now restricted to five countries, South Africa, Namibia, Kenya, Zimbabwe and Tanzania. Genetically unique populations that once existed in Nigeria, Cameroon, Chad, Eritrea, Ethiopia, Somalia, Mozambique, Malawi and Angola have disappeared. The origins of the 'genetic erosion' coincided with colonial rule in Africa and the popularity of big game hunting. From the second half of the 20th century, however, poaching for horns has dramatically depleted their population and genetic diversity, especially in Kenya and Tanzania.

What is important for evolution?

Improve the bracketed part of the sentence.

The naughty boy made (many a mischief).

Sound waves can not travel through a

Improve the bracketed part of the sentence.

Whatever said and done, (not less vital) is the future of the border separating Northern Ireland from the Irish Republic.

Rearrange the parts of the sentence in correct order.

Of these,

P-­mostly two have proved
Q­-to be bones of contention
R­-between the two parties

The Indus Valley houses were built of

If no multivalued attributes exist and no partial dependencies exist in a relation, then the relation is in what normal form?