Background: While the Grants were on the Galápagos, a drought occurred. As a result, fewer seeds were available for finches to eat. Birds with smaller beaks could crack open and eat only the smaller seeds. Birds with bigger beaks could crack and eat seeds of all sizes. As a result, many of the small-beaked birds died in the drought. Birds with bigger beaks survived and reproduced (see Figure below ). Within 2 years, the average beak size in the finch population increased. Evolution by natural selection had occurred.

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had fewer seeds available for the finches?
Answer: Boat

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had more seeds available for the finches?
Answer: Park

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had more birds that could eat only smaller seeds?
Answer: Boat

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had fewer birds that could eat only smaller seeds?
Answer: Park

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had fewer small-beaked birds die?
Answer: Park

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had more small-beaked birds die?
Answer: Boat

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had more large-beaked birds survive?
Answer: Boat

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had less large-beaked birds survive?
Answer: Park

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had fewer large-beaked birds reproduce?
Answer: Park

Situation: Two islands inhabited by many species of finches went through some climatic changes during the past several years. While Park island hat wetter than average years, Boat island experienced years of drought, so many birds died.

Question: Which island had more large-beaked birds reproduce?
Answer: Boat

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had fewer seeds available for the birds to eat?
Answer: Galapagos 1

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had more seeds available for the birds to eat?
Answer: Galapagos 2

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had more small-beaked birds that could only crack open smaller seeds?
Answer: Galapagos 1

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had fewer small-beaked birds that could only crack open smaller seeds?
Answer: Galapagos 2

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had fewer small-beaked birds die in the drought?
Answer: Galapagos 2

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had more small-beaked birds die in the drought?
Answer: Galapagos 1

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had the average beak size in the finch population increase?
Answer: Galapagos 1

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island didn't have the average beak size in the finch population increase?
Answer: Galapagos 2

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had more big-beaked birds survive?
Answer: Galapagos 1

Situation: The explorers visited Galapagos 1 and Galapagos 2, both islands part of the same archipelago. Island 1 had experienced a drought in recent years. Both islands had populations of birds living there.

Question: Which island had fewer big-beaked birds survive?
Answer: Galapagos 2

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had fewer seeds available for the birds to eat?
Answer: Bank

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had more seeds available for the birds to eat?
Answer: Port

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had more small-beaked birds die?
Answer: Bank

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had fewer small-beaked birds die?
Answer: Port

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had fewer birds with bigger beaks survive?
Answer: Port

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had more birds with bigger beaks survive?
Answer: Bank

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had more birds with bigger beaks reproduce?
Answer: Bank

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had fewer birds with bigger beaks reproduce?
Answer: Port

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island had observed the occurrence of natural selection?
Answer: Bank

Situation: Two neighboring islands inhabited by thousands of birds each were hit by extreme weather. While Port island experienced wet weather over the past 3 summers, Bank island experienced severe drought, therefore the food supply on the island diminished.

Question: Which island hadn't observed the occurrence of natural selection?
Answer: Port