LIFE SCIENCE

Detailed explanation-1: -While visiting the Galapagos in 1835, British naturalist Charles Darwin observed local plants and animals. He became fascinated by species that seemed related to ones found on the mainland-but that also had many physical variations unique to different islands.

Detailed explanation-2: -A rather unmotivated and failing medical scholar, Charles Darwin accompanied Captain Robert Fitzroy as a travel companion and naturalist on the HMS Beagle.

Detailed explanation-3: -The world first heard about Galapagos more than 470 years ago. The Dominican friar, Fray Tomás de Berlanga, Bishop of Panama, was the official discoverer, arriving on March 10, 1535. Currents inadvertently drove Fray Tomás towards Galapagos, after he had set out from Panama on his way to Peru.

Detailed explanation-4: -In Galapagos he found a remarkable population of plants, birds and reptiles that had developed in isolation from the mainland, but often differed on almost identical islands next door to one another and whose characteristics he could only explain by a gradual transformation of the various species.

Detailed explanation-5: -1: Darwin’s Finches: Darwin observed that beak shape varies among finch species. He postulated that the beak of an ancestral species had adapted over time to equip the finches to acquire different food sources.