Darwin's Finches video EC

How many species of beetles are known to exist?

• Less than 200,000

• More than 150,000

• Over 300,000

• About 177,000

What islands are researchers focusing on to understand how new species form?

• The Hawaiian Islands

• The Galapagos Islands

• The Canary Islands

• The Falkland Islands

Who have been studying the finches in the Galapagos Islands for over 40 years?

• Charles and Emma Darwin

• Peter and Rosemary Grant

• James Watson and Francis Crick

• Gregor Mendel

What significant observation did the Grants make about the finches during a severe drought?

• Finches migrated to other islands

• Finches changed their diet to insects

• Finches with smaller beaks survived better

• Finches with larger beaks survived better

What did DNA evidence reveal about the finches of the Galapagos?

• Each island has its own unique ancestor

• They are more related to mainland species

• They all come from a single common ancestor

• They are unrelated to each other

What plays a role in preventing different species of finches from mating?

• Song and appearance

• Color of feathers

• Flying ability

• Size of the island

How did the Grants demonstrate natural selection in finches?

• By changing the finches' diet

• By observing beak size changes over generations

• By genetically modifying the finches

• By introducing new finch species to the islands

What effect did an unusually strong El Nino have on the finches?

• It had no significant effect

• It led to smaller beaks being advantageous

• It led to larger beaks being advantageous

• It caused many finches to migrate

What is a key factor in the evolution of the Galapagos finches according to the Grants?

• Climate change

• Human intervention

• Geography and ecology

• Predation by other animals

What insight does the history of the Galapagos finches provide into the diversity of life?

• Species cannot change once they have evolved

• Only islands can produce new species

• Diverse environments promote the production of new species

• Species diversity is random