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Question
Assertion :Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds. Reason: Ancestral seed-eating stock of Darwin's finches radiated out from South America mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats.
Assertion :Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds. Reason: Ancestral seed-eating stock of Darwin's finches radiated out from South America mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats.
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Darwin's finches are a group of about fifteen species of passerine birds. They often are classified as the subfamily Geospizinae or tribe Geospizinae. It is still not clear to which bird family they belong, but they are not related to the true finches. They were first collected by Charles Darwin on the Galapagos Islands during the second voyage of the Beagle. All are found only on the Galapagos Islands, except the Cocos finch from Cocos Island. The term "Darwin's finches" was first applied by Percy Lowe in 1936, and popularised in 1947 by David Lack in his book Darwin's Finches. David Lack based his analysis on the large collection of museum specimens collected by the 190506 Galapagos expedition of the California Academy of Sciences, to whom Lack dedicated his 1947 book. The birds vary in size from 10 to 20 cm and weigh between 8 and 38 grams. The smallest are the warbler-finches and the largest is the vegetarian finch. The most important differences between species are in the size and shape of their beaks, and the beaks are highly adapted to different food sources. The birds are all dull-coloured. Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds. Ancestral seed-eating stock of Darwin's finches radiated out from South America mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats. So, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Darwin's finches are a group of about fifteen species of passerine birds. They often are classified as the subfamily Geospizinae or tribe Geospizinae. It is still not clear to which bird family they belong, but they are not related to the true finches. They were first collected by Charles Darwin on the Galapagos Islands during the second voyage of the Beagle. All are found only on the Galapagos Islands, except the Cocos finch from Cocos Island. The term "Darwin's finches" was first applied by Percy Lowe in 1936, and popularised in 1947 by David Lack in his book Darwin's Finches. David Lack based his analysis on the large collection of museum specimens collected by the 190506 Galapagos expedition of the California Academy of Sciences, to whom Lack dedicated his 1947 book. The birds vary in size from 10 to 20 cm and weigh between 8 and 38 grams. The smallest are the warbler-finches and the largest is the vegetarian finch. The most important differences between species are in the size and shape of their beaks, and the beaks are highly adapted to different food sources. The birds are all dull-coloured. Darwin's finches show a variety of beaks suited for eating large seeds, flying insects and cactus seeds. Ancestral seed-eating stock of Darwin's finches radiated out from South America mainland to different geographical areas of the Galapagos Islands, where they found competitor-free new habitats. So, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
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