Darwin's Finches and Natural Selection

The video discusses Darwin's finches as an example of natural selection, focusing on their evolution on the Galapagos Islands. Initially, 30 birds arrived and adapted to different environments, leading to the development of various species like the ground, tree, and cactus finches. The video also covers the study by Peter and Rosemary Grant, who observed changes in beak size due to a drought, demonstrating rapid natural selection.

What concept do Darwin's finches primarily illustrate?

• Natural selection

• Genetic drift

• Artificial selection

• Genetic mutation

Where did the original group of finches arrive, leading to the study of their evolution?

• Canary Islands

• Hawaiian Islands

• Falkland Islands

• Galapagos Islands

What caused the finches to spread out across different islands?

• Predator threats

• Climate change

• Resource competition

• Human intervention

Which type of finch developed a beak suitable for digging under soil?

• Warbler finch

• Ground finch

• Tree finch

• Cactus finch

How many species of finches evolved on the Galapagos Islands?

• 8

• 5

• 13

• 20

Who conducted a long-term study on the finches of the Galapagos Islands?

• Charles Darwin

• Peter and Rosemary Grant

• Alfred Wallace

• Gregor Mendel

What environmental event in 1977 affected the finches' food supply?

• Volcanic eruption

• Flood

• Drought

• Earthquake

What change was observed in the finches after the drought?

• Migration to other islands

• Decrease in population

• Increase in beak size

• Change in feather color

What percentage increase in beak size was recorded after the drought?

• 10%

• 5%

• 3%

• 1%

What does the study of finches on the Galapagos Islands support?

• Theory of relativity

• Theory of evolution

• Theory of gravity

• Theory of plate tectonics