Questions

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.

From the second half of the 20th century what has caused a dramatic fall in black rhinoceros population?

Improve the bracketed part of the sentence.

Happy is the man (who acquired) the habit of reading when he is young

Isobars are atoms of different chemical elements that have ______.

Name the bird that migrates from the north pole to the south pole and back?

In a combination reaction there can be ______.

I. two or more than two reactants

II. two or more than two products

III. only one product

When an object is thrown vertically upwards, at its maximum height its _____________.

Improve the bracketed part of the sentence.

Even after 70 years of achieving independence, democracy, (in its true senses), was yet to come to India.

Choose the correctly spelt word

The threat of an epidemic caused great alarm and