Galapagos Finches

How long have biologists Peter and Rosemary Grant been studying finches on the Galapagos Islands?

• Since 1983

• Since 1993

• Since 1973

• Since 2003

What is the primary function of the woodpecker finch's beak?

• Picking off insects

• Probing into cactus flowers

• Cracking open seeds

• Concentrating on beetle larvae and termite larvae

How many ancestral finch species are believed to have arrived on the Galapagos Archipelago, leading to the current diversity?

• One

• Two

• Thirteen

• Many

What was the primary effect of the 1977 drought on the medium ground finch population on Daphne Major?

• It led to an increase in the average beak size of the finch population.

• It caused a decrease in the average beak size of the finch population.

• It had no significant impact on the beak size distribution.

• It caused the finches to migrate to other islands.

What factor most impacted the size of the finch beaks?

• rainfall

• predators

• temperature

• sunlight

What happens when separated species come into contact again?

• they find a cross species mate and create greater biodiversity

• they mate with their own species and create a distinct species

• they compete for the same resources and push out other organisms

• the stronger species dominates the weaker one creating less biodiversity

Which type of environment will produce the most species?

• one with very harsh conditions because they have to adapt

• one with very few predators so multiple offspring survive

• one with a lot of biodiversity because there are more opportunities for evolution

• one with a wide range of temperatures to provide many opportunities to adapt