Questions

The gases used in different types of welding would include

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.

What is important for evolution?

Sound waves can not travel through a

Select the synonym of

perusal

Which one of the following scripts of ancient India was written from right to left ?

Rearrange the parts of the sentence in correct order.

P - Kohli, along with Deepika and Ranveer, has led the ascent of millennials to the top of the rankings.
Q - For the first time a female sportsperson has made it to the top 15.
R - This year saw PV Sindhu make an entry at 15.
S - Former captain Dhoni slipped from 9th place last year to 13th this year.

Select the synonym of

metropolitan

Sardar Patel Stadium in Ahmedabad is renamed as