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TLS Online TPP Program

#Question id: 13022

A certain species of pine tree survives only in scattered locations at elevations above 2,800 m in the western United States. To understand why this tree grows only in these specific places an ecologist should

#Unit 10. Ecological Principles
  1. Conclude that lower elevations are limiting to the survival of this species.
  2. Study the anatomy and physiology of this species.
  3. Investigate the various biotic and abiotic factors that are unique to high altitude.
  4. Analyze the soils found in the vicinity of these trees, looking for unique chemicals that may support their growth.
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TLS Online TPP Program

#Question id: 15716

#Unit 11. Evolution and Behavior

Evolutionary biology extends and amplifies the explanation of biological phenomena. It complements studies of the proximate causes (immediate, mechanical causes) of biological phenomena If we ask what causes a male bird to sing, the proximate causes include the action of testosterone or other hormones
TLS Online TPP Program

#Question id: 4717

#Unit 11. Evolution and Behavior

 If Darwin had been aware of genes and their typical mode of transmission to subsequent generations, with which statement would he most likely have been in agreement?
TLS Online TPP Program

#Question id: 4716

#Unit 11. Evolution and Behavior

Which of the following is correct match?

A

Wallace

I

Changes in allele frequency due

to random genetic drift

B

Sewall Wright

II

Evolution by natural selection

C

Carl Woese

III

hybrid sterility

D

Haldane’s rule

IV

DNA sequencing led to molecular phylogenetics

TLS Online TPP Program

#Question id: 4715

#Unit 11. Evolution and Behavior

Claytonia virginica is a woodland spring herb with flowers that vary from white, to pale pink, to bright pink. Slugs prefer to eat pink-flowering over white-flowering plants (due to chemical differences between the two), and plants experiencing severe herbivory are more likely to die. The bees that pollinate this plant also prefer pink to white flowers, so that Claytonia with pink flowers have greater relative fruit set than Claytonia with white flowers. A researcher observes that the percentage of different flower colors remains stable in the study population from year to year. Given no other information, if the researcher removes all slugs from the study population, what do you expect to happen to the distribution of flower colors in the population over time?
TLS Online TPP Program

#Question id: 4714

#Unit 11. Evolution and Behavior

After the drought of 1977, researchers hypothesized that on the Galápagos Island Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at the finches. Which of these events is now most likely to occur to finch beaks on this island?
TLS Online TPP Program

#Question id: 4713

#Unit 11. Evolution and Behavior

A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed. Which of these statements explains why the pigweed reappeared?