Questions

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

Which of these artist was principally entrusted with the task of 'Illuminating' the original document of the Constitution of India ?

Improve the given sentence if necessary.

This book is the more interesting of the three.

The International township built near Pondicherry in India in Collaboration with UNESCO is called

Improve the bracketed part of the sentence.

I had (not only helped her by) giving hints but also with providing him links.

Improve the bracketed part of the sentence.

(It is no good to cry) over past failures.

Improve the bracketed part of the sentence.

She (has fallen out with) the boy she was supposed to marry.

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?