Questions

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 _____________.

Isobars are atoms of different chemical elements that have ______.

Improve the given sentence if necessary.

This book is the more interesting of the three.

Improve the bracketed part of the sentence.

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

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?

What was the main objective of the Wahabi movement which during 1852-70 was particularly active in the Punjab, Bengal, Bihar and the NWFP?

Which address identifies a process on a host?