Becks of Finches

Which of the following statements best summarizes this data?

• Average beak size stayed about the same except during wet years.

• Average beak size decreased during dry years and increased during wet years.

• Average beak size increased during the dry years and decreased during wet years.

• Average beak size changed randomly.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS4-4

Explain how the Beaks of Finches laboratory activity demonstrated the concept of competition.

• there was no competition

• Competition for food occurred when the seeds became scarce, as in the second round

• Several students competed when they tried to get food/seeds out of a small dish.

• finches ate the seeds

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which two species of finch would be affected if a bird with a grasping beak that ate ants and beetles was introduced into their habitat?

• large ground finch and warbler

• woodpecker finch and small ground finch

• large tree finch and small tree finch

• cactus finch and medium ground finch

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Which finch eats all animal food and has a probing bill?

• Warbler Finch

• Small Ground Finch

• Small Tree Finch

• Vegetarian Finch

Select the 2 finches that would most likely compete for the same food.

• Small Tree Finch

• Large Tree Finch

• Cactus Finch

• Medium Ground Finch

Tags

NGSS.MS-LS2-1

Which finch or finches eats mainly animal food and has a probing bill?

• Woodpecker finch

• Cactus Finch

• Sharp billed ground finch

• Medium Ground finch

How many finches eat mainly plant food and have crushing bills?

• 1

• 3

• 2

• 5

How many finches eat mainly animal food and have grasping bills?

• 1

• 2

• 3

• 4

The film defines species as populations whose members don't interbreed. What keeps different Galápagos finch species from mating? Select all that apply.

• Individuals only recognize and respond to songs of their own species.

• One population eats mostly small, soft seeds and the other population eats mostly large, hard seeds.

• Geographic isolation and different environments led to changes in traits that affected mating.

Answer explanation

In general, female finches only recognize and respond to males that sing their species’ song. They will ignore singing males of other species. Also, the Grants and their team gathered evidence to show that finches choose mates on the basis of certain traits that differ among species. These differences arose as geographically isolated populations changed over time in different ways (i.e., without mixing their genes).

Tags

NGSS.MS-LS1-4

Which statement is correct about the graph?

• The amount of seeds available increased from 1976 to 1977.

     

• The total seed biomass available for finches to eat decreased from January to July of 1976.

• The total seed biomass available for finches to eat increased from January to July of 1978.

• The total seed biomass available for finches to eat was the highest in January, 1976.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4