Questions

Improve the bracketed part of the sentence.

One to spearhead this campaign is an IT professional, known for (having working) on net neutrality and founded Internet Freedom Foundation.

Improve the bracketed part of the sentence.

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

Statement coverage will not check for the following

Magnetic disks are the most popular medium for

Improve the given sentence if necessary.

This book is the more interesting of the three.

Select the synonym of

spine

Select the antonym of

primed

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?