Reading Comprehension for SSC CGL PDF:
Download English reading comprehension practice passages with solutions PDF. Important previous asked reading comprehension (RC) exercise with answers explained in detail.
Download Reading Comprehension for SSC CGL pdf
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Instructions:
A passage is given with 5 questions following it. 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.
Question 1:
What is important for evolution?
a) Genetic variation
b) Large population
c) Mixing of species
d) Survival of the fittest
Question 2:
Sub Sharan Africa has lost how many black rhino genetic lineages in 200 years?
a) 64
b) 20
c) 44
d) 30
Question 3:
Genetically unique black rhinoceros has been lost in all of the following countries, except?
a) Tanzania
b) Nigeria
c) Chad
d) Malawi
Question 4:
From the second half of the 20th century what has caused a dramatic fall in black rhinoceros population?
a) poaching
b) colonial rule
c) big game hunting
d) fall in genetic diversity
Question 5:
Genetic diversity is proportional to __________.
a) species population
b) the ability of a species to survive and reproduce
c) inbreeding
d) extinction
Solutions: 1 to 5
1) Answer (a)
Genetic variation is the cornerstone of evolution. Thus, A is the answer.
2) Answer (c)
Two centuries ago, the black rhinoceros – which roamed much of sub Saharan Africa – had 64 different genetic lineages. Thus, C is the answer.
3) Answer (a)
The species is now restricted to five countries, South Africa, Namibia, Kenya, Zimbabwe and Tanzania. Only, Tanzania is present in the options. Thus, A is the answer.
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4) Answer (a)
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. Thus, A is the answer.
5) Answer (b)
And so a low genetic diversity decreases the ability of a species to survive and reproduce”. Thus B is the answer.
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