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TLS Online TPP Program

#Question id: 3396

The Galapagos finches were an important clue to Darwin's thinking about the origin of species. These finches are believed to have descended from a single ancestral species that colonized the Galapagos archipelago, America, over a short period of time. The Galapagos finches differ in their beak shape and size. Different species feed on seeds that vary in size and hardness. Which of the following is the most likely explanation for these patterns?

#Section 2: Evolution

  1. The finches represent an example of directional trend in beak size from small to big.

  2. Beak shapes changed in response to different seed types and these changes were inherited by subsequent generations.

  3. The ancestral finch already had all the beak variations and different lineages formed that were specialized to eat different seed

  4. The finches represent an example of adaptive radiation in which beak variation was generated by mutation followed by selection by different seed types.

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TLS Online TPP Program

#Question id: 12676

#Section 5: Applied Ecology & Evolution

Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following questions.

What would be a likely entry for box B?

TLS Online TPP Program

#Question id: 12677

#Section 5: Applied Ecology & Evolution

Aquatic ecosystems that are most readily damaged by acid are those that lack an important buffer that dissolves into the runoff after a precipitation event. What is this buffer?
TLS Online TPP Program

#Question id: 12755

#Section 5: Applied Ecology & Evolution

Which of the following statements best describes why biologists are currently concerned with global warming and the thawing of permafrost in many areas of the tundra biome?
TLS Online TPP Program

#Question id: 12756

#Section 5: Applied Ecology & Evolution

Flycatcher birds that migrate from Africa to Europe feed their nestlings mostly with moth caterpillars. The data presented show the mean dates of egg laying, hatching, and fledging of flycatcher young, and the 1980 and 2000 peak mass of caterpillars.


The most likely cause for the shift in caterpillar peak mass is
TLS Online TPP Program

#Question id: 12759

#Section 5: Applied Ecology & Evolution

As climate changes because of global warming, species? ranges in the northern hemisphere may move northward. The trees that are most likely to avoid extinction in such an environment are those that
TLS Online TPP Program

#Question id: 12760

#Section 5: Applied Ecology & Evolution

Which of the examples below provides appropriate abiotic and biotic factors that might determine the distribution of the species in question?