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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: 8920

#Section 2: Evolution

Almost all of the major animal body plans seen today appeared in the fossil record over 500 million years ago at the beginning of the
TLS Online TPP Program

#Question id: 12110

#Section 4: Behavioural Ecology

Which of the following has the smallest biomass?
TLS Online TPP Program

#Question id: 9277

#Section 5: Applied Ecology & Evolution

The light energy absorbed by the carotenoids is transferred to chlorophyll for photosynthesis; because of this role they are called
TLS Online TPP Program

#Question id: 10858

#Section 2: Evolution

Which of the following is an example of obligatory symbiotic mutualism?
TLS Online TPP Program

#Question id: 4652

#Section 2: Evolution

The graph depicts four possible patterns for the abundance of 3TC-resistant HIV within an infected human over time. If 3TC resistance is costly for HIV, then which plot (I—IV) best represents the response of a strain of 3TC-resistant HIV over time, if 3TC administration begins at the time indicated by the arrow?