Questions

Improve the bracketed part of the sentence.

The speed with which (these hate crime videos travelling) on social media frames a difficult challenge for law enforcement authorities.

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?

Which is the gas used for making vegetables and vanaspathi from vegetable oils?

Improve the bracketed part of the sentence.

The young man (was carried by) the passionate appeal made by the social worker.

Improve the bracketed part of the sentence.

(Take off) your shoes before you enter the temple.

Who was the founder of Nanda dynasty

Improve the bracketed part of the sentence.

The duo’s network was (made to learn identify) true signals using previously vetted signals; they then studied the weaker signals.

India is not a member of